I got into C64 6502 coding last year - had a pretty decent game prototype working (before had to relocate and life got in the way!). If anyone wants to go down that rabbit hole, I recommend the Twitch streamer "Shallan" (https://www.twitch.tv/shallan50k). All his old videos are on YouTube too, and tonnes of great info to get started and motivated.
I might as well plug my 6502 assembler MOS[1] again. It's written in Rust and comes with a full language server implementation that does things like full code formatting, refactoring support (go to symbol, renaming, etc) and if you're using the VICE emulator for the c64 it even integrates with the Visual Studio Code debugger.
Edit: last year around this time I was planning a Commodore 64 6502 assembly project, and I didn’t follow through, so, yeah, that.