VERY "WELL CODED" PLATFORMER

spoilers ahead (I'll say what are the glitches):

when you pause the game when you're not touching the ground your hitbox will be disabled for .4s and then the game will stop and you'll be able to jump when you resume the game even if you're not touching the ground  + some spikes don't deal damage, and you can jump before touching the ground which you can use to not get damaged by the spikes and finally some spikes and walls don't have any hitboxes