Help with a glitch.

[bossedit8]

Make the Mushroom either on Don't Move, add "speed=0" to them or make sure if a Lava is extremely close to touch the Mushroom, they disappear via Event. Sadly there is no other way.

[bossedit8]

There is no other way, unless your Level doesn't take a lot of process like a lot of objects...

[HenryRichard]

You could put 5 red rupees in the same block. That would give you 100 coins, which would be a 1-up. I don't think they crash when hitting lava.

[bossedit8]

Oh yeah, you can get a Power Up on an instant once you hit something that has an Event triggering in it so these power ups aren't free in anyway in your Levels.

[Enchlore]

Use invisible NPCs set to be solid for other NPCs but not for the player, then place them above the lava. This would make enemies stand on lava, though.