I couldn't quite figure out how to progress pass the initial area, but I liked the animations and the whole opening sequence was entertaining!
Viewing post in APEIROGON jam comments
Resuming progression: Left click to release a shockwave that damages power-ups and scares monsters away temporarily. Once the power-up is killed, you have 5 seconds to use it by pressing M, depending on the power-up it will either heal/protect you or damage the monsters.
But I'm glad you enjoyed the visuals and cutscene!