Algodoo

Green - player
Control with WASD
shoot bullet with E

Red - enemy
Reverses direction when it hits a transparent stopper

Orange - stationary platform

Gray - door
You must collect a key for it to unlock

Yellow - Moving platform
Moves like the enemy, uses the same stoppers.

Big Green - timer
Shows in-game time in seconds and frames, stops when hit.

More items may be added soon
Item recommendations are welcome
thamks bai