the one that represent the grass and the one that represent the water...
Solution:
Dont give the 'grass' and 'water' sprites the 'platform' behaviour.(this is used for the player)
For wall and floors, you only need to enable the attribute 'solid'(a tick box in sprites properties)
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Edit
These are the event lines you should use (after removing the 'platform behaviour from the water and grass)
+ player: overlaps grass : offset (0,6)
+ System: Trigger once
-> player: Spawn object grassparticles on layer 1 (image point 1)
+ player: overlaps water : offset (0,6)
+ System: Trigger once
-> player: Spawn object waterparticles on layer 1 (image point 1)
Heres the CAP file:
link