I liked the fun cutscenes and the metroidvania-like gameplay. It's a pity that there's no music or sounds. Controls are too sensitive to my opinion. When I slightly press the arrow key I expect my character to move only few pixels forward, not the half of tile. Shooting enemies are the big pain in the arse. They start to shoot at you while they are out of view. Would be better if they start shooting when you can see them. And also there is a bug in the boss room. There is a invincible door through which you can leave accidentally during the boss fight. And of course you'll have to start it all over after that.
So what can I say in conclusion? This is a not bad game and sure it has the big potential, but it needs a lot of polishing. Anyway it was fun to play. Keep up the good work!