The idea (well, actually the game mechanic) is pretty much worked out; now I need two things. I need to figure out the latest version of Flixel, so I know how to program it; also I need some pointers on a theme and usable tilesets that can be converted to said theme.
Ages ago I created a LID for a tile-swapping game that was going to be a mixture of Tetris and sliding-block styles, in C++ with SDL. It never went anywhere, but for a player character and tile theme I ended up using some glyphs from the BOBCO fonts - including a Dobbshead on the player body.
So it appears my puzzle platformer will be tentatively titled "Bob" Goes to Dobbstown.
Or something like that.
Oh -- and I need to locate an alternative platform tileset as a potential alternative to Ari Feldman's old things from 1996.