Update: The Mega Man game I've been working on off and on since Fall time is pretty much done with all major glitches worked out, i.e., the enemies don't shift around when pressing against walls or anything like that.
All that is left to do is some graphical level designs and NPC behaviors, and possibly weapons/abilities that Mega Man can get.
He even does wall-slides and wall-kicks like Mega Man X.

I'm not certain if I will publish a demo soon though, as this time I would like to actually make a full game first before publishing it.