This is level 5 of the A-Tunnel.
There really isn't a strategy for this level; as the Lizard, just avoid stepping on the crumbling tiles. As the Child you can step on them but don't jump off them. As the Angel, just don't use the dash, unless it is an emergency.
Since many crumbling tiles are inter-connected, many of them will crumble if just one of them is crumbling, causing mayhem to this level. So really stay away from them.