There is no main character

Dash for the dasher character only works on Left Shift, not on Right Shift.

Better avoid using copywrighted characters.

Ignoring the issues regarding copywright, using a bunch of characters from different games, each one with different movement styles, mechanics and physics is not a good idea. because you don't have a central mechanic from which you can build your games' moveset.

For example, both Mario and The Knight can jump but the knight can jump AND dash so why would I ever want to use Mario?

Aproaching the game in this Frankstein fashion creates this kind of redundancy where things don't fit perfectly or repeat themselves.

A better aproach in my opinion would be having a set of charcters that can each do ONE thing. One character can jump, another character can grapple hook, another can shoot, another can dash. and then you build the level design on top of these mechanics that complement themselves.

It's not a perfect solution, but I believe it's better than to have a bunch of copywrighted character each one do one level that all feel very disconected from each other.

Also, there were some problems on the level design, with the foreground being difficult to distinguish from the background, weird collisions and some very unfair jumps.