I can't do other than joining others in the comment section, this is an awesome job, and even more impressive that you didn't use an engine. It's definately hard, I could get around 2.8k score but forgot to printscreen it, so damn xD The jumping feels a little bit weird, I saw my hp going down, but it was like 100 to 90 to 30 then dead, I assume there isn't a cooldown on getting damaged, so as long as I'm touching the cube I get the damage right? Other than this it's awesome, congrats!