Hello!
Thanks for the feedback! We will take it and update our game after the voting.
The file size is 109MB, which is not that huge, takes less than a minute to download. It is 109MB, because of the graphics (textures, lightning and etc).
The player is tall, we will reduce his height in the future update.
The heal heals less - true - we will work on it to achieve consensus between healing and taking damage.
The extra enemy turn is a glitch, that needs to be fixed.
The main objective of the game is to explore the 20 rooms, while randomly encountering with the monster, then you win.
Overall, thank you for the given time and feedback, we appriciate your comment and will look after these problems and glitches. :)