Remaking full-game without any monetary and/or partnership incentive is near impossible as considering just creating the first level from scratch took me more than a month.
Yes, the basic gameplay is there now, so it's generally a matter of constructing the levels, however what requires most time is to script the game, not the gameplay & logic.
It is possible to add until the end of water level, though, I'll work on that when I have time, and possibly update the game and engine for better performance & visuals.