This is so awesome! I LOVE the aesthetic (the colour palette + art style + tiny bug sprites are all so great) and the way you handled menu navigation is just absolutely genius. Choosing each upgrade was super fun too - I loved the chaining one in particular. If I had to give some feedback (and if you decide to developing this further) I would have loved to continue past the final wave to see how far I could make it (you made me feel like a Morse code god by the end and I needed to be humbled LOL). Well done!