I enjoyed the gameplay and the cute pixel art. One suggestion, if you'd like to extend the game, would be to allow players to postpone the inevitable eruption, but make it increasingly difficult the longer they delay it. My score is 4127.
Being able to delay the final calamity eruption event was one of the first core mechanics I wanted to implement for the game, but later I decided that for a jam game it might not be necessary. I believe I'll implement this in the future though.