A craft can be directly above the pad and still be on course for a failed landing. Rocket Lander checks motion and orientation at touchdown, not just where the sprite appears. Use the gauges to separate a position problem from a velocity problem, then spend fuel on the component that actually needs changing.
Four conditions must coincide at contact
The craft must touch down over the marked pad, with sideways speed no greater than 20, downward speed no greater than 34 and tilt within the engine’s upright tolerance of 0.2 radians, roughly 11 degrees. The speed values are game units. They describe this browser game, not a real spacecraft procedure.
The display rounds some readings, so aim for a margin instead of trying to land exactly on an apparent boundary. A successful vertical-speed reading alone does not override excessive sideways motion or tilt. Before the final descent, name each condition separately: over the pad, sideways motion controlled, descent slowed, and craft upright.
Pointing upright does not cancel sideways motion
Left and Right rotate the craft. They do not directly move it left or right. Thrust points along the craft’s orientation, so a tilted burn changes both horizontal and vertical velocity. With no thrust, rotating upright leaves the existing sideways velocity in place.
There is no ordinary horizontal drag gradually bringing the craft to rest in this flight model. If it is drifting right, a suitable leftward thrust component is needed to reduce that drift before you return upright. Waiting until you are already over the far side of the pad can leave too little height to brake sideways and still satisfy the final orientation requirement.
Begin slowing before the pad fills the view
Gravity continually adds downward velocity. Upright thrust opposes it, but reducing a fast fall takes time and vertical distance. A very late burn may visibly fire the engine without slowing the craft enough before contact. The useful observation is whether the downward-speed gauge is decreasing with room still below the craft.
Tilting the engine to change sideways motion reduces the upward component available for slowing descent. That creates a real tradeoff: a large lateral correction near the ground can disrupt an otherwise acceptable vertical approach. Where possible, address the largest sideways error while you still have height, then return toward upright and refine descent. This is a planning order, not a proven solution for every trajectory.
Budget engine time rather than assuming a long hover
The round permits up to 90 seconds, but that is not 90 seconds of powered flight. The engine starts with 100 fuel and consumes about 13 units per second while firing, giving roughly 7.7 seconds of total thrust. Rotation alone does not consume that fuel. Long burns early in the attempt leave fewer options for the final descent.
A short burn also has consequences after you release the button: the velocity it created persists. Watch the result before applying the next correction. A continuous burn can reverse a descent into a climb and spend fuel gaining height you did not need. On the other hand, preserving fuel is not a success if the craft hits too fast. The primary objective remains satisfying the touchdown conditions.
Use the failure label to choose the next experiment
An off-pad landing is chiefly a position-at-contact failure, though its cause may be uncorrected sideways velocity. A hard landing over the pad can come from excessive sideways speed, excessive downward speed or too much tilt. Do not respond to every failed landing with more upward thrust; it might leave the actual offending condition unchanged.
After each attempt, write the first condition that visibly became difficult to recover. If the craft was upright but still sliding, investigate the earlier lateral burn. If it was above the pad with fuel remaining but descending rapidly, investigate when vertical slowing began. Make a fresh attempt with one timing change and keep the same observation. This produces a diagnosis rather than an unexplained sequence of different flights.
Two experiments to try
EXPERIMENT 1
Observe the drift that orientation cannot remove
Use the fixed opening position and watch the H speed reading as well as the craft.
- Start and briefly observe the initial rightward drift without thrust.
- Rotate nearer upright without firing.
- Notice whether rotation alone removes the sideways travel, then restart before trying a longer flight.
What to observe
The craft’s appearance can become upright while the H reading remains nonzero and the position continues changing.
Why this comparison is useful
Rotation changes the direction of a future force. It does not retroactively remove the velocity already present. This isolates why upright alignment is only one landing condition.
Your change and observation:
EXPERIMENT 2
Change the beginning of the slowing burn
Keep the same broad approach and use the displayed downward velocity as feedback.
- In one attempt, note when your main upright slowing burn begins and whether V falls before contact.
- On a fresh attempt, begin that burn earlier while trying to keep the sideways plan similar.
- Compare descent rate, remaining fuel and whether the craft begins climbing unnecessarily.
What to observe
Look for enough slowing room without assuming that the earliest or longest burn is automatically best.
Why this comparison is useful
The comparison exposes the tradeoff between stopping distance and fuel use. It is an experiment to refine your control, not a guaranteed landing script.
Your change and observation:
Check your decision
The craft is upright over the pad, but H reads 26 while downward speed is within its limit. Is the touchdown acceptable?
Answer and explanations
The sideways velocity needs correction before contact. Plan the tilted braking burn early enough to return upright afterward.
- No: sideways speed must also be at most 20.
Supported. Position and vertical speed cannot cancel a failed horizontal-speed condition.
- Yes: being upright removes the sideways-speed requirement.
Not supported. Tilt and horizontal speed are independent checks.
- Yes, if fuel remains when the craft touches down.
Not supported. Remaining fuel contributes to a successful score, not permission to exceed landing limits.
Your next practice session
Use one attempt to diagnose sideways drift and another to change vertical braking time. Combine the two only after you can explain each gauge.
Scope and checks
This guide describes the current Playfield implementation. The experiments are proposed ways to practise, not measured player results. Rules were checked against the game source; the written scenarios and explanations received a separate review.
- Playfield rocket-lander engine — Primary implementation inspected for the stated mechanics. The practice experiments are proposed exercises, not reported human playtest results.
Playfield Arcade · Updated 4 October 2026 · Original practice design, AI-assisted writing and code.