Not bad at all.
Nicely done remake of a classic game that was harder than hell to beat. ((30$ at the arcade in quarters...))
The sounds though were a little repetative after awhile but I loved the weapons and upgrades. Trule awesome. Though the fully upgraded blue lazer looked odd... looked like I was shooting icecubes of death or something. not that i mattered XD the spread and the purple lazer thing I used more. Love it all the same.