A nice start to a game with some really cool ideas and mechanics. I like the pixel art style and clearly a lot of work has gone into it. However, it is lacking polish that will bring it to the next level:
1. Music / Ambient noise would help a lot.
2. Easier controls (having to click the button to switch was a bit annoying). Maybe having a shift arrows to use combat? Or some kind of other toggle? Perhaps mouse clicks? I'm not sure how to fix it but I know it feels a bit awkward.
Not bad, but not amazing. I'm looking forward to seeing an update.
Keep up the good work