Cute animations and nice art, as rough as they may be I really like them, very charming. I like the base gameplay aswell, simple but to the point.
That said I'll have to agree with the other feedback, those levels are just too damn long. Could really benefit from being "Level 1-1, 1-2, 1-3, 2-1, 2-2 etc." instead. Playing this for too long really hurts my eyes, and failing a 5 minute long level because of one tricky enemy placement is really really frustrating. Couldn't get myself to play past the second level even though I really wanted to see all the content.