New Game Maker 8.1 Engine

[Bully With a Hat]

I made a new engine in GM8.1, and it's going pretty well, except for the semi-solid platforms and Mario taking damage. Some of the semi-solids work fine, but when the get to a certain y-level, it acts like a regular solid platform. Whenever Mario takes damage, the game freezes. I need help, so I'm posting a beta build so you can see the code.

http://www.mediafire.com/folder/jnu2t2d9...gie_Beta_1

I hope you can help!

---

Also, another bug: When I stomp a Galoomba, all of them disappear instead of just the one.