Update 2.0 is out! Bosses now break apart piece by piece: ram the bottom, tap-jump for the middle, hold-jump for the top, and hit the glowing ★ weak spot at the peak of your jump for triple damage. Every boss has its own weak-spot pattern and attacks, and all 9 upgrades now visibly transform your rock.
Patch notes: https://dorivoltgames.itch.io/grow-a-rock/devlog/1722363/update-20-smash-bosses-apart-see-every-upgrade
Free to try in the browser: https://dorivoltgames.itch.io/grow-a-rock