Stage 1 - Spyz Like Us
Take the gauntletz, smash all the ice rocks and get a coin. The arrow points to the red warp trigger.
Proceed to the megaphone and get a shovel. Open the hole on your right and get zap cola, smash the ice rock to get another zap cola. Close one of the holes to get across and attack the straw grunt with both your gruntz. This will kill him much faster. Open another hole to get a coin and proceed to the checkpoint. Click and hold your left mouse button and draw a rectangle around both gruntz, this will activate them both at the same time. Together attack the gauntletz grunt. Smash the ice rock on the left to get a coin and close the hole to get to the black one switch and have the shovel grunt get the magnifying glass. Spy on the bricks so you can see which brick (right one) to smash. Kill the enemy grunt and smash the ice rock to get some more zap cola. Spy again on the next bricks and smash another one (second from the top). Kill the next grunt, smash the ice rock and again more zap cola.
When the ice rises, cross to beat the next enemy with your gauntletz grunt, smash the ice rock and walk to the secret ? switch.
After activating the switch you've only got a short period to get the letter so hurry.