Strangely addictive. Having the prices of each item go up slightly really enticed me to just go for one or two more runs to get enough coins to unlock the upgrade. But the upgrade itself makes me want to try it out, which turns out allows me to go deeper into the mines. Found it hard to put down. Great in terms of gameplay. There is a small issue I have with the attack and rope input being the same key, sometimes would take the ropes up or down instead of attacking an enemy)
Artwork and music were both really nice, love the pixel art.
Nice game :)