The new version 1.1 of Jet Set Boom has the following new weapons:-

Mining robot - Fresh from harassing Willy in the mines, it will charge forward and try and kill whoever it bumps into.

Sinclair User - The hot-potato of Speccy mags.  Don't be the one near it when it stops moving!

Foot of God - The only thing that can really make sure that Willy is dead.

And the new maps Jet Pac and Kokotoni Wilf.