new version: https://scratch.mit.edu/projects/985485754/ Use ARROW KEYS or WASD to control the player. You can DOUBLE JUMP after jumping or bouncing off an enemy. JUMP ON TOP OF ENEMIES to kill them and increase your score. AVOID THE SPIKES that will fall from the ceiling, right after the WARNING SIGN starts FLASHING.
The second version better version to come later. I fixed the score issue. gravity physics by @griffpatch rest is by me. Later version to come with better graphics.