I like. Well done. Little grindy first ~30min, had to go Idle sometimes. Make demo on steam! (prob need two extra upgrade categories, IDK) after 300m not much to do
I was suprised to hear other people playing up to 1000m. 300m is more what I would have expected. You definitely run out of stuff too early. Unfortunately I didn't have more interesting ideas but I should at least increase the max limits.
Maybe spawn some rings after 200m, that pierce and bombs are "useless" against, and the next upgrade can work on them better. Like 0 blocks between 200 and 205 just a 5m ring.