Walled In ... Or Out

Grunt(z) What to do to solve the mini-puzzle
Springz #3
Gauntletz #4
Bricklayer #5
SpongeGun #7
Gauntletz #4 stepz onto the top row of Arrowz , and comez to a stop atop a GHS and two GPz are lowered .
Springz #3, Bricklayer #5 and SpongeGun #7 enter into the Foundation Tilez area.
Bricklayer #5 layz Bricks around the perimeter of this area on the Foundation Tilez that do not have a Hole above them.
Move Gauntletz #4 along the Arrowz to the BOTS .
Using Springz #3 as bait, lure the enemy Gruntz to where they can be knocked onto the Arrowz or into a Hole by Spongegun #7.
Gauntletz #4 breakz the Ice Crystalz and getz the Coin .
Spongegun #7 knockz Gauntletz #4 past the Arrowz to retrieve the 3 Coinz in the northwest corner.
Move all four gruntz to the southeast landing. Can you walk on water?