Had to download the game cuz the web version wasnt working right as someone else already said, you should try to enable the fullscreen button on the web game and correctly set the window size in the game page (Set the size to the same on godot's window size parameter)
The game was really fun altought a little confusing at first, but the mutations were really cool! It would have been good to have a little more hints on the recipes as you kind of have no idea what to mix, nice work tho on the creepy aesthetic, congrats!