Such a great game on so many levels. It's disappointing that you couldn't make five stars.
Let's cut straight to the chase, this game is advertised as a puzzle platformer. In the game, it says "think outside the box". The levels are designed for a puzzle platform game. However, you hardly have any real puzzles. Literally more than half of the 43 levels is just difficult platform jumping and really simple fluff. Then most of the actual real puzzles you have are pressing a key. At first, it was kind of funny. It's like you have no idea what to do, and then it suddenly clicks in your head. It's fun. Then it gets so damn repetitive. Every single puzzle seems to be "if you hit this key, you can solve the puzzle!" and eventually it just becomes obvious and is no longer fun. The only actual puzzle was the Konami one. Near the end of the game, it just basically becomes I Wanna Be The Guy.
Despite this, you had great audio, a decent story, superb graphics and animations, and everything was smooth. You even had a pretty good ending. The game is a bit like a Valentine chocolates. It has some really pretty packaging, and it's pretty good, but in reality the chocolates are mediocre at best. If you create a sequel, spend a bit more time on making creative puzzles and you'll be looking great.