Cool inivative control scheme, with some small issues though.
Visually i like the whole silouette thing for the mech kinda like it is in Luftrausers. And the alien mechs with their slight green glowy elements looked really cool too.
Now while i like the way you did the controls and i think i get the idea of what you were trying to do, i fell there are some issues with it that makes the game way harder. Mainly the fact that when you right click to rotate your mech still moves all overthe place and you just bump into enemies and walls. I feel one way to improve this and make it work well would be to have the mech stop all movement when you hold the right click to adjust ror rotation and resume movement when you release it. That way you don’t sacrifice your unique controls and keep the analogue speed.
So yeah in short really cool concept, a few tweaks here and there and you’ve got quite an innovative title.
Well done :)