Wait a minute, you know that GM is capable of createing .exes, right?
EDIT: I just played it. OMFG. What does that even have to do with Blockland? All it is is one of the example games that comes with gamemaker, wish ONE sprite changed into a poorly drawn Blockland mini figure done in MS paint. I could have done this in about fortyfive seconds. If you seriously want to make this into a real Blockland platformer, GOOD loving LUCK. You'll need it if this is what you consider to be a demo.