Once I figured out how to get through the tutorial quicker I made it through a few levels!

I think you could have less of a tutorial. Because this is a platform game I think most people are familiar with the basic controls -- you'd just need to explain the splitting and other unique mechanics as you go.

I found it hard to look down from a higher angle, which would have made the jumps easier (some of those jumps are massive btw!)

Well done on a first GWJ entry. :)

Like the character splitting mechanic. Good idea!