Love the look and feel of the environment.  I found it difficult to time the jumps/shooting.  But I loved that I could access the next levels to try them (even though i'm not great at playing games lol).  

I think my only complaint is that I spawn facing sideways when the level starts.  minor complaint, but after restarting the level about a hundred times (seriously bad at playing games), it got annoying to have to turn to start the level.