Click to go up (depends on the gravity). Start with normal gravity. Blue portals are normal gravity and yellow portals are upside-down gravity. 10 levels so far. Inspired by Geometry Dash by RobTopGames (specifically the wave gamemode).
Update 1.0: Verified all 7 levels. Speeds set at 1, 1, 1.5, 1, 0.5, 0.25, 0.25. Update 1.01: Changed level speeds to 1, 1, 2, 1, 0.75, 0.5, 0.5. Dubbed the buff update. Update 1.02: Verified 1.01 Level 7! Added a feature that lets the wave slide on the edges with proper direction. Update 1.03: Changed Level 7 speed to 0.3. Update 1.1: Added Level 8 at speed 1. Verified. Update 1.11: Added adaptation to different FPS. Update 1.2: Added option for mini wave. Update 1.21: Added mini seizure button. Update 1.22: No longer a [TEST] in the title. Update 1.23: Removed mini seizure button. Update 1.24: Changed Level 7 speed back to 0.5. Update 1.3: Added Level 9 at speed 1.5. Update 1.4: 26 May prank: Mirror mode. Update 1.5: Added Level 10 at speed 0.75. Update 1.51: Verified Level 9. Update 1.52: Added noclip accuracy counter. Update 1.6: Added rainbow trail.