It's fun and challenging, and the addition of different characters with different abilities is fresh. However, maybe make it where the picture of the player changes depending on what character you chose, also maybe put links to the original games of some of the characters. Another thing that annoyed me is that with some of the level designs, it's hard to see where you are. Also dying isn't really a threat as it is an inconvenience, so that could be worked on.
Also, how do you get all the sketch orbs, because the first time I played I got the bad ending, but the second time the only thing I did differently was choosing a different character. So I'm just confused as to what happened with the endings.
But other than that the plot was good the gameplay was good. If you made any other games I would like to play them.