Interesting implementation of the theme. I love how polished it feels to play. Some of these levels were very tough and I loved the challenge.
Great addition of accessibility options too!
Thanks for playing! I noticed after the fact I forgot to add what those small upgrades do (doh!). They buff the NEXT wave from that lane, but the upgrade resets after it spawns. Was meant to allow quick momentum shifts and responses. I ran out of time to put it in the UI and forgot to add it to the instructions page. My bad. Thanks for trying it out!