Love the vibe of this, super simple, great use of colour and light. There might be some room to improve the general feel of the game, things like mouse sensitivity and how fast the projectiles actually move. Really atmospheric.
This is a problem I have had with more games - the mouse settings. When editing, it was all good, but when I made the final product and tested it, it was super highly sensitive.
Next time, I will probably add settings and a slider there, to solve this problems.
