How do I fix this collision bug?

Okay, so I'm trying to make a platformer without ANY behaviors, just pure events, and I've got the horizontal movement going, but now theres another problem, gravity.

The actual falling is working completely fine, but the ground collision isn't, the player keeps sinking into the ground, can anyone help me fix this?

How can we help you without your code?

Please attach the *.c3p file; this will make it easier for us to resolve the issue.

If you're just doing it in events without behaviors, you will also need to handle the collisions with events too. That involves checking for an overlap with obstacles and then moving out of the obstacle and maybe updating the velocity.

There are many ways to do that, but one way to do an event based movement for a jump with gravity would be:

on any key pressed
-- sprite: set vy to -100

every tick:
-- sprite: add 100*dt to vy
-- sprite: set y to self.y+vy*dt

sprite: y > 400
-- sprite: set y to 400
-- sprite: set vy to 0

on any key pressed
-- sprite: set vy to -100

every tick:
-- sprite: add 100*dt to vy
-- sprite: set y to self.y+vy*dt

sprite: vy>0
while
sprite: overlaps ground
-- sprite: set y to self.y-1
-- sprite: set vy to 0