Having a crack on CSDb pointing to the original release is a good advertisement. Your game also got release posts in several C64 related forums.
Good luck with the AI player. Maybe offer several skill levels of it.
Checked the Demo. Quite nice for a first try on a C64 game, even with SEUCK. But won't spend any money for it.
If you want ot continue using SEUCK, you may check the SEUCK School at https://tnd64.unikat.sk/
To see what C64 SEUCK is capable of when pushed ot the limits, check https://psytronik.itch.io/wow-shooters
Tried with WinVICE 3.1 from https://csdb.dk/release/?id=155140
and GTK3VICE-3.9-win64 from https://csdb.dk/release/?id=248528
Oscar64 is said to generate about 6x faster code from C than cc65.
https://github.com/drmortalwombat/oscar64
Quite hard to have 2 paths right at start (walk down and walk left) where you are immediately Game Over. I suspect the game being that unforgiving all the way through? Are those paths final dead ends or is there a way to safely get through them later in the game, maybe by collected items or something else?