Not gonna comment on everything but a few stuff that took me a while to understand :
- at first I didn't know how to attack, so I had to reboot the game to re-read the controls. I had been pressing left click, but the lack of feedback and the animation / character being so small on screen means that I didn't see my own attacks ! don't be shy on feedback !
- the fist ability from the ghosts is unclear. At first I assumed it meant I was dealing more damage, but then I accidently destroyed the terrain. When I tried destroying without having the fist ability, it didn't work. It felt like a bug, but I suspected powers to do something about that so I experimented and found that the fist actually allows to destroy terrain, not deal more damage. I think fist wasn't the correct icon for this kind of ability.
Anyway, huge congrats on a first successful jam entry !