Thank you very much for trying out the game! I'm really glad you liked it.
You are the third person to mention that about the controls so I'm definitely going to add a 'classic' option or something that works like the original Defender controls. I am also thinking about making a more 'rapid fire' weapon as the first unlock (again for a slightly more 'Defender' feel) as the current first unlock (shotgun) is a bit clunky/odd for a shmup of this nature really.
I only have achievements and things like settings/define keys to add now. Whilst trying to finish this has been a labour of love most of the time it's also felt like I've been trapped in an existential hell of my own making sometimes, I feel a bit like that now tbh!
Anyway, thanks again for your feedback and if you have any more fire away. I really appreciate the input I've had from this forum over the course of the development and will probably be posting a download link to the beta here soon.