The design here is very poor: the hack was promising in the first levels, I was looking forward it but as soon as you pass the first world, the hack gets very annoying. Many levels use the "fly with cape" gimmick, that has been executed badly, since I had to retry many and many times, despite said levels being small. The general level size also matters me a bit, most of them are just small and annoying. The difficulty curve is very weird too: the first level of world 2 is one of those which use the cape gimmick. Coming from a pretty easy world 1, I wasn't expecting it at all. Overall, not a hack I'd play if I was looking for good design.
The aesthetics are pretty good on the other side, the author used the redrawn gfx base, which is executed decently. Some levels' palettes do look ugly though. If you spent more time on this factor, it would've been much better in my opinion.
-Hack breaks on accurate emulators due to music.
-The upmost part of "treetop terror"'s BG gets glitchy if you start the level from the midway point.