How do I add and substract movement speed?

Ha, Thanks! If you just make loads of little games as practice (I have like 14) you tend to just pick things up as you go along

Oh yeah, and if ever you need any help and don't get an answer here feel free to PM. (I'm not often in this forum)

thanks mate. ofc i have more questions! how to make power-up that has a cooldown so you can use it every 20 seconds?

Okay, I'd use a variable here, I'll be using "CanUsePowerUp" which starts at 0

X is how long the power should be active

Events: On power up activated

CanUsePowerUp=0

Actions: Set CanUsePowerUp to 1

Set max speed to self.platform.maxspeed+50

Wait X Seconds

Set max speed to self.platform.maxspeed-50

Wait 20-X seconds

Set CanUsePowerUp to 0