There is a hexagonal grid of coloured blocks at the top of the screen, while the player's character sits on a boat floating in water.

As with Worms, holding down the fire button increases the power behind the weapon's launch, affecting how far it will travel.

It is possible to fire the bazooka (and some other weapons, such as the grenade and dynamite) in an "arch", allowing players to reach difficult areas.

In this mode, the player travels around the world (in a method slightly reminiscent of Capcom game Pang) completing puzzles.

Players can use this opportunity to shoot at each other with their bazooka in an attempt to reduce their health and ultimately knock them out of the game.

Critics from Nintendo Power dismissed Worms Blast as overly-difficult to the point of being unenjoyable; they claimed being a millimeter off on a shot could result in the player having to start over, and that the better stages were later in the game and thus required lots of practice overwhelming to novice players just to get to them.