Holy shit, that's it! Thanks so much!

I don't remember what the game was called, but I played it from a diskette on DOS, if I remember correctly. You were controlling a sort of space ship and jumping on different platforms while continuously moving forward. I loved it. But I don't remember what it was called so I can't look it up any more.

We also had some sort of maze game and Commander Keen. But I sucked at Commander Keen, so I never got past the first level.

This doesn't seem right...

Now I understand why, in D&D, Small creatures can ride Mastiffs.

I'm gonna play a new campaign in D&D. And I DM a different one, where I am going to play with some homebrew stuff I made up myself, so I'm really hyped for that!

I would just say 150 if I meant both...

I did the screen flip thing to a coworker once. And then he just took the monitor and turned it upside down. Didn't see that coming.