That "Death Ray Manta" looks really cool but I'll let Wabbit pick out the good ones..since he likes shooters.
Colourful arena shooters for Windows:
"Hello, after all these years with Bagfull Of Wrong, it’s time to retire it and start a new life elsewhere with some new games and a fresh start on the horizon and so, with that, all my previous games are now available to download and play for free."
Bagfull Of Wrong | Colourful arena shooters for Windows - http://bagfullofwrong.co.uk/bagfullofwords/