From previous experience I know that I need to improve my debug tools for inspecting memory during development. I'd like to make a simple IDE to help me keep track of stack and variable state, as well as having the ability to set interpreter breakpoints.
I'll be using C++ with raylib so that I can rip out and reuse utility code from other projects, including past runs through the wonderful Crafting Interpreters book.
Game-wise, I'm thinking something NES or ATARI level of gameplay and graphical complexity. For pixel art I use Aseprite and for fonts I use BMFont. My favorite gamepad for these type of games is the 8bitdo SN30 pro which works great with raylib.