How hard would I be raped by lawyers if I tried to make a legally distinct version of this where I changed every sprite and rewrote code? Or would I be better of making a romhack with the original assets but giving it away for free and having a paypal or whatever for donations?
I like the idea of remixing retro games into unique challenges that combine aspects of multiple games and feel like Nintendo didn't go far enough in NES remix and the Nintendo World Championship game on switch. They basically did the bare minimum and left a lot of fertile ground untouched. Would be even cooler to include non-nintendo games like sonic, castlevania, bionic commando, a shmup, etc. in the mix.