Very good game with a great idea!! I like the roguelike style than the game have making everytime you die you have to start again and you have to think all well to go further and further
The gameplay was great, only than will be great to have different animations for different attacks to add a bit more of dynamic to the gameplay Also it will be great to have something like a highscore to know how further you went so the player wants to get more and more further and beat it own high score Also having a story mode or at least a more detailed story of what happened, who we are and why we are doing that will be great And finally, having an interactive tutorial will be really helpful instead than text written of how the game works, so players understand it easily
For the rest the game is looking great!! Good luck working on it and improving it more and more :D