Here's the demo for the zcontest.

This demo is nota finished game !
This demo should ne be tested on real calc !
This demo is playable but too easy !
This demo contains only 4 levels !
In fact this is a demo, not a game, so not a finished entry.
But all the part of this project works fine, just need some hours to design levels, adjust difficulty, add gaphics effects, allow saving/loading a game, add a menu.

To try it, just do :
Send(9pgrmOILCAP 

(on a ti82 stats(.fr) or a ti83 regular)