It's alright
Doesn't accurately depict welding at all, but hey, it's a video game, can't complain.
Ok so... I don't know if I'm just using it wrong, but the ARC welder doesn't work at all and only the TIG seems to be the only working one.
The game is pretty easy for the first few levels, just lay down a weld on the lines and avoid the floating gas tanks and oxy bursts... However, your welds have to be pretty much pixel perfect for them to register... Which is lame...
Also there's not rod degeneration or speed penalties for going too fast.
For the oxy bursts, it's hard to tell where they're coming from, thus making it hard to complete.