The unofficial sequel to This Is The Only Level! Great game, it must have been hard to tune the level for so many different characters. Sadly I couldn't figure out how to complete the level with Dashboy and Greedyboy. So the thrid and second boys from the right didn't unlock. However, the most right one did (not sure if this is a bug).
Oh, those took me a long time! For Dashboy, it is just a matter of doing some tight jumps. A tip I could've used is while jumping on the 2-enemies, you can actually ctrl to the left ledge, making it a lot more trivial. Greedyboy is a bit more difficult. Collecting the coins in the shallower water is crucial at the end.
BTW SORRY LATE POST