I think it's a cool game with potential that can be explored.
Things I had troubles with are: Sometimes I get stuck in the air when collecting stuff, I don't know if double jump is intentional, if it is, I didn't really know it and just accidentally did it. The attack looks like it's hitting but it's not. If you want it to be intentionally hard to aim the attack, maybe at least make the visual queues match the area where you can damage the enemies. Also I don't know if you want the player to be encouraged to fight the enemies because to be honest it's easier to just run since the attack of the player is hard to pull off. It would also be cool if there was feedback to getting damaged like invincibility frames so I don't instantly die when a spider decided it wants to walk on my dying body :v.
Like I said it has potential and there's some cool stuff happening here and these are just my opinion, maybe others had a different experience on it. Overall good job! Hwachaa!