Nice little game, needs some work though.
I love the concept of the game, pure and simple puzzle fun. Only there are some bugs. If you go through the portal at the end of the level, you can fly out of the next level, and you're stuck there. You can also be misplaced at the beginning of a level. Fortunately, the reset works just fine.
The graphics aren't all that super, but they aren't so bad that they disturb me.
If you want to improve this game, then fix the bugs and maybe do a lil graphic update. Overall it's a good game :)