Platforms and jump

[JakeyMarsh1]

As a player, I want reachable platforms and a reliable jump so that I can traverse gaps.

Acceptance Criteria:

• Platforms spawn ahead on a simple, predictable cycle (e.g., three heights) and move with world speed; off-screen platforms are removed.​
• Spacebar triggers a jump only when grounded; jump height/arc controlled by constants; no double-jump exploit.​
• Player can land consistently on platforms.​

Tasks:

• Platform component and simple SpawnManager with fixed interval/height cycle.​
• Physics colliders: player ↔ platforms; grounded check via body touching.​
• Jump: apply vertical velocity when grounded; tune gravity/jump force.​
• Test deterministic course and jump reliability