You got to the last level before the end of the frog levels(there's only one other level after it also, so you didnt miss much); That's pretty good :)
I see what you mean about the leaps of faith.. The moving platform level you're talking about is probably the least playtested level, so I'm not too surprised. I'll work on it some more and keep it in mind for future levels. I might also increase the default resolution to help see further.
You bring a point I didn't think about there with the diagonal keys.. I added them mostly with the controllers in mind. I thought some people might find it more precise to have buttons binded to each diagonals. For the keyboard I don't think they're as useful. I'll see what I can do.
Thank you a lot for the feedback! I really hope the game wasnt too frustrating. I know I struggle a lot with difficulty..