Mad Caps is Shareware program for Windows developed by Reflexive
"Unbottle the fun with Mad Caps, a bewilder game gone MAD! Send bottle caps flying with every advance to procure your cram of tasty soda. Zap caps with Rayguns, objective 'em with Rockets or utter the Alien to transfigure them. Collect letters to spell Mystery Words along with other ""under-the-cap"" bonuses. Let Mad Caps quench your thirst seeking fun!"