I really like some of the ideas and it really seems to be fun to play BUT I have 3 graphic problems that totally break the game for me:
1) As others said its not an easy-to-read game: Its not 100% obvious which objects are decorations, interactive, impassable and even the buy menus. There are many ways to fix that: contrast, glows, groups of colors, borders.... you decide.
2) This may be 100% personal but the fact that the "camera" is really close to the character really increases to me the confusion. I really really feel that I would need a zoom out option to even try the game.
3) As a graphic designer your HP UI gives me cancer (Im not intended to offend, its just that it contradicts all good GD implementations)
a) Its too far from the main area were the player concentrates its vision//focus, and knowing how much HP you have is essential to surviving/playing
b) its tooo tiny (it even has the same size as the gold, but is far more important)
c) Numbers are"slower" to understand than other more visual options like "life bars" and you are making an "action" game
d) Has 0 contrast or background, meaning that if the floor beneath its is brown or red you cant even see it
Beyond those 3 things, I really see the potential for a fun game .