After beating the boss with a club a message appeared, but I could not read it as I was clicking for my next attack and clicked through it. It id put an apple in the bottom left. I was not able to mouse over or click on it to get more info, but it would be nice if you added a way to see what those things did. That display area feels a bit big, especially since it doesn't seem to do more than show what power ups you've collected, and could probably use with downsizing.
I started by playing with the goblin, since that was in the description. It took a bit to get the hang of it, and I died a couple times to one of the bigger enemies that must hit hard. Then I was able to get through and best the 2 big bosses and get a win screen.
The colored squares showing the open doors works, but could use with updating to something nicer.
The combo system was nice and really helped in dealing with stamina.
I tried again with the skeleton. It was much nicer with the stat boosts. That time I got a bonus item in each level, so when I beat the final boss and got an item, it appeared outside the bottom left area for items. That playthrough I also had some trouble getting to the boss. It initially felt like the paths leading out of each room were random, but then I noticed a pattern and when I entered from a certain door, that decided which doors were available to exit from. I seemed to mentally block myself from the right path that time as I went in circles for a while checking every side passage before I finally found the right pattern of rooms to get the door to the boss room.
This was a fun little game. The UI could use a bit of work, but the core gameplay mechanics work well. The goblin sword was cute, and I like the curse of you becoming the sword for the theme. It also took me a while to use right click and find that it swung in the opposite direction, as I just saw both were options and did not register they might be different. It might be worth adding something about each being a different direction, or just leave it up to the player to discover.