Graphics look pretty awesome, however disinguishing the background and foreground from the actual level takes quite some time to get into, i recommend you change that.
When you get hurt "respawning" sometimes leads to rather awkward situations, i fould myself in perma jumping respawn circles, i think it got caused my me keeping the jump key pressed after "dying", which meant I instantaniously jumped after i respawned, you could change it that jumpkey presses don't count for future jumps if you die.
Also for me it feels like you respawn a bit too close to obstacles, something feels weird about that, i think the problem is not knowing when exactly you start moving again so it's hard to react.