Sweet thank you for your feedback! I will change it so each upgrade adds one damage.
It doesn't have to be one, it could be +1, +2, +3 etc. But it felt like you did x2 multiplicative or something which was way OP.
Yup it was 2X damage but good idea I like the idea of +1 better. I kinda like +1, +2, +3... but for now Im leaving it at +1 to see how it feels