So here are the screens from my unfinished (yet) projects:
First one is Last Stand 2D (Zombie Shooter in Counter Strike 2D style):

Here is remake of my old Gravity project, there is only test level with spikes, checkpoints, bonuses (style from game: VVVVVV).

And finally here is Battle City Multiplayer ( ). Development in the very begging...

BTW all of this games are 3D Even if they look like 2D.
All models are animated (like GIF sprites).
There is one more little project to come (Special Forces from old PSone), but no screens yet... Please tell me which idea and which picture you liked most.

Edit: I forget to mansion the size of the projects:
1 --> Last Stand 2D - 140 kb (with some sounds)
2 --> Gravity 96 kb (without sounds)
3 --> Battle City something around 10 kb (without levels, sounds)