Very nice game. I dont know why but these Pico-8 games always look and feel so good. I have to try pico 8 for myself now i think.
But of course its not the engine that makes a great game. Its you ;).
Well i did a little Research and found Out that Pico 8 uses Lua as its programming language and im not really down to learning Lua(Languages where the first entry of an array has the Index 1 creep me out lol). I thought, since its basically an emulator or virtual machine of a non existing console, that it would use a simple Assembler or something C like. That would have been way more interesting for me personally. But hey, you enjoyed it and thats what matters.