Wallop, Krag, Space Merc, Mage, Incoming, Pirates, Cosmotastic,
Weeble Farm and more
been making games with Game Maker for years. Some people might
not take it seriously but I've found it to be an amazing tool
for prototyping ideas and learning. Using Game Maker I've learned
to script inventory and combat systems, sidescroller physics,
particle systems, basic A. I. and user interfaces.
Probably my favorite
GM project is Miner 21 where you explore the cellular workings
of a giant planet-eating space monster.