Magic Perhaps?
The game was very good. I just want to offer you one suggestion. The game got very boring after getting everything. I upped my health to 50 as my first upgrades. Then I got a sword followed by a shield. Afterwards, I got the other three upgrades, and after that, it's just waiting a few levels to get more swords and shields. Could you possibly add a few magic spells and an MP bar? Maybe an invincible and can move for 10 seconds spell which takes 50% max MP, an orc slayer spell which sends a giant axe through the screen taking 10 MP. Having more to do that just hitting C repetitively after trapping them...