I'm really glad you're enjoying it so far! You can initiate a Dash Attack when RT breaks out into a Super Run (i.e. when you see his feet turn into a cloud of running fury). It's funny that you find the jumping to be stiff because many people around the MegaZeux community were actually praising on how smooth the controls were. Eh...to each his own.
Working with MegaZeux is pretty great! You can make virtually any type of game your heart desires, from platformers to adventure games to RTS's to RPG's. I recorded most of the sound effects myself, as well as the voice characterizations you hear (but they play at a higher frequency than my actual voice so that RT sounds like a kid), but some SFX are ripped as well. If you've played Sonic 2 or Mega Man X, you'll know them when you hear them.
Working with MegaZeux is pretty great! You can make virtually any type of game your heart desires, from platformers to adventure games to RTS's to RPG's. I recorded most of the sound effects myself, as well as the voice characterizations you hear (but they play at a higher frequency than my actual voice so that RT sounds like a kid), but some SFX are ripped as well. If you've played Sonic 2 or Mega Man X, you'll know them when you hear them.