When I saw the jams theme, I fought about making a only one resource type of game, where you have to continously collect your resource again, but decided against it. It feels very nice to see somebody else execute this idea so perfectly!
Using your head to kill multiple enemies at once feels very statisfying, but this game also shows the negatives of seek only AI behavior. Since I wanted to group them together for maximal points, I always ended up sticking towards corners and walls, thus feeling very claustrophobic. I wonder how the game would play, if the area would be infinitely big.
Still awesome twist on the genre and very well executed!