You are a Mistborn from Brandon Sanderson's series, which means you can metabolize (burn) certain types of metal to grant special abilities. See Thumbnail for instructions. It is a bird's eye view of the ground, and the yellow blocks are solid to you and soldiers, but Koloss just jump over them.
Credit to Brandon Sanderson, his books are my favorite, and you should totally go read them sometime. See if you can beat 100! Sorry, no Atium. Too complicated to code viably. Better in Full Screen! Please leave comments about your experience playing! I know, you're supposed to be able to burn more than one metal at a time, but think of how confusing that would be! you could just be burning all the metals at once, so then I would have to make the metals run out eventually, etc, etc. Koloss will trample Soldiers out of their way.