Cool, I managed to play the keyboard friendly version! If you want feedback for the kb+m controls, it would be:
It would be more intuitive moving the tankloo with WASD alone, so that Shift isn't needed for movement. Instead, Shift + WASD could be used for the melodies, like the stratagems in Helldivers 2. In that game WASD normally moves the character, but if you hold Ctrl, then WASD instead lets you input the directional codes that correspond to each stratagem.
As for the game itself, it was fun but short. Some games overstay their welcome but I wouldn't mind if there was more of this one! All the building blocks were there and were satisfying, but each playthrough ends quickly before you ever get to see lots of enemies to fight. I still enjoyed it though, good work :)