I love the game concept and it actually similar to my game,check it out.However,the game mechanic and level design should get a tremendous improvement on it. I suggest the game testing section be like: die less than 3 times too easy, die 3-5 okay, die 10 times more unsolvable.I did this in my game hope it helps!
(P.S. I sure we can't pass through level 4 no matter how fast I press the spacebar: >>,tried 10 times more :>>)