First of all, I actually liked how simple the game was. I thought it would be boring, but I was surprised. The game was short, but it never got boring, it was fun and rewarding to pass through some difficult parts.
Now, about difficult, I think it was Ok, but the 2 first levels were harder than the last one, and this was a little disappointing. I really liked the music, but it sometimes stopped, not something really bad, but it should be checked. The art of the game was Ok, not bad, but it could receive a improvement, just a little to not lose the charm of the game.
In the end, it was a charming game, but it could receive a better treatment. Now I'm expecting the sequence of "Bemim X"!