For the control scheme, might be a good idea to put the FG controls in the game instructions, because ctrl+space does some very unhelpful things on a computer with certain non-English language input methods enabled.
It's also annoying that people clamor "8-bit!" at this sort of thing, because this is clearly pre-NES-era style. Atari 2600, that sort of thing; fewer than eight bits. Not that that's a strike against the game; it's just frustrating that people don't know that words have meanings sometimes.
I liked the game, at least what I played of it--three worlds. I wanted to skip two worlds and jump to 6, and I almost got all the stars to do it in the first three sections, but for the life of me I cannot figure out how one is supposed to get that third star in Jack And Jill. Oy.