Ah the classic rage induced game haha. My feedback for this from a game design perspective is to always make the collider of harmful objects to be 90% ish smaller than the object itself. I noticed when my character didnt even touch the red spikes i would still die. That would be unfair for the player. Also for any platformer game, always give some leeway for the player to jump from one platform to the other. Make the platform collider slightly bigger than the platform itself. Or implement an air time where the player can stand mid air for a split second before he falls down. Any way good attempt here. Well done.