I like concept very much. It's fun to play and looks great.
Things that went wrong for me:
* I stuck in some location with the character invisible and not reacting on buttons
* Inputs are inconvenient for browser play: Esc and right mouse click have special meaning in browser - exit from full screen and open popup menu. Thus I could use throwing knives only horizontally. For inventory "I" button would be great. Closing the shop can be the same F button used to open it.
* I'd wish to see how much crystals and slime gel I collected right in the UI without need to open inventory
* Gameplay becomes repetitive after five or so times returning to the base to sell things and make upgrades. It would feel much better if traders were scattered along the map.
In general, well done, great work!