11BFLY.EXE

Arrow keys to control the butterfly.

By grazing bullets, you uncover the Lua source code for the current attack. After you've uncovered the whole function, you can use your gun (Z and X keys) to hit bullets and increment numeric variables.

The attack then changes in real time.

This page only contains the project file for download, you can play the latest version in browser at the official TIC-80 site: https://tic80.com/play?cart=4257