Walter is in charge of the Bomb disposal team. You have to guide him around the screen using the cursor keys and then press spacebar to detonate the bombs. Beware! After the fuse has been started, Walter only has 1.5 seconds to move out of the way before the bombs explodes, so you need to be quick!!! To move a bomb along the rails hit the spacebar twice quickly, then the direction you want to move in. There are several different tiles (rivet tiles, dissolver tiles, ice tiles, slotted tiles, teleport tiles) and bombs (small bomb, medium bomb, large bomb, radar bomb, land mine). In later levels beware of falling crates!