"Falling Down" behavoir acting funny

[MalNeige]

It's me again. I figured since I've already created collisions, I would just try to make the player fall down. I figured that instead of making a separate thread, I'd do a little research and I did. The first problem that came up is that the player doesn't seem to collide with the dirt and dirt with grass tiles. But that's small potatoes in comparison to the player simply flying off the screen. I have a feeling it's because of the values I'm inputting for the player. Hopefully you guys know how to fix it.

- Stacy