Very entertaining (however, I'm a welder myself). Only beef is it's kinda short, and it could have done with some 'in-depth' tutorials to tackle the game. However it's simple enough to pick up quickly.
It's a good game to help with your hand-eye coordination. The dialog is humorous and entertaining if wee-bit long, in comparison to the gameplay. I personally would like to see more 'missions' in the future.
Apart some small bugs with the cursor placement, it's well done. Once you know how to guide yourself though, it's fine.
All in all, very entertaining. You owe it to yourself to try it.