I know I don't have to do this, but I think it's right that I post a better version of demo one. This fixes some bugs, and it adds slopes and stuff to make it better. One thing I noticed but I don't know how to fix is that the bonus game in level one has some cut-off to the side. I don't know why it's there, because it's only on screen 0. Anyway, please enjoy this hack. (screenshots are outdated)
(Mods, you can delete the other one.)
This hack was okay. The design isn't the best, since there are lots of flat lands with almost nothing interesting going on, but atleast, the design was not a totally flat land put there. The sprites placement also doesn't feel like it was too random. I don't complain it too much overall. Yes, it's pretty linear, can result boring after a bit, but it's not too bad.
The aesthetics kept the vanilla feel, with small edits to blocks and minor elements. I wish the levels were a bit decorated, since they are just ground without any decorations. It felt a bit empty.
As overall, not a great hack, but it's not awful either.