The game is written in KickAssembler, using the plugin for Sublime Text. Surprisingly smooth process to port from C64 using this setup.
I'm by no means an expert in assembly, I only started a few weeks ago after watching Shallan's Let's Make A C64 game series. So there's probably lots of bad, extremely inefficient things in here, but it works and should be quite accessible to beginners as I don't like having magic numbers or anonymous jump labels in the code.
https://github.com/1888games/Donkey-Kong-Junior-C64
The VIC-20 code and assets are in the vic20 folder.
Source code for Donkey Kong Junior
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