Hi Betty Lou,
Here's the SOLVE for Level 13 which I think is the hardest of all the levels:
Lower left quadrant:
Eat both mushrooms.
Break wall to inside of the L shape leaving a wall to block laser bot.
Melt ice blocking the laser.
Go over bridge - mushroom and touch stone.
Left middle quadrant:
Make one hole that is at level of ice that is above blocking a bot and infront of lower tank bot. Get that lower bot in hole.
Melt the ice in front of the bot. Stand behind hole to bring bot into hole.
Upper left quadrant:
Go over bridge and eat mushroom.
Remove wall that is blocking laser bot - this should take out another laser bot that is blocking the centerNW stone.
Take out this laser bot just used. No more mushroom.
NW center quadrant: touch stone and go north over the bridge.
NE center quadrant: eat 3 mushrooms and touch stone. Go back north across the bridge.
Middle top quadrant:
Melt ice at 2I and 3H or stand left of wall, face west and melt ice infront and to your right.
Remove the wall that blocks the laser from bot at lower right quadrant - this should take out the same laser bot.
Lower right quadrant:
Eat 3 mushrooms.
Break the lowest part of wall under destroyed laser bot.
Make hole at level right below that wall and across the bot that is facing left. Place that bot in hole.
Eat mushroom at bottom of frame.
Make a hole under the ice. Melt ice. Place the bot in hole.
Eat all 3 mushrooms. Ignore the last bot and 2 mushrooms.
Break the wall below the bridge to jewel.
Stand on bridge and break wall blocking jewel. Touch jewel.
I have to go out for a while and will redo the other one later.