Cool game, but a lot of things lacked clarity. Sometimes I would go to the key and it would move away, sometimes into the dead-zone (which also wasn't clear to the player, just a simple red line or something could work). And sometimes when I get hit the damage seemed to be inconsistent. Adding sound effects and visual queues would do wonders for stuff like this and maybe instead of the timer you could have a toggle button to switch modes, that would allow for some really cool level design. There also seemed to be a bug where my character wouldn't always heal after respawning. Overall I liked it though and would like to see more if you continue with it.