Super cool game! The lighting effect looks great! I'd love to know how you made it. The whole game plays very well, and it feels fast and responsive. As you've noted yourselves, the difficulty curve is quite tough, but that also creates the nice moment of panic when you see a tiny monster going for your gem. The whole game is very clear, and makes total sense. The only possible exception to for me was the shop - both that you have to stand under it for it to open (I spent a while next to it trying to figure out why the menu sometimes suddenly opened and closed again) and that it changes the view in a way that changes the aim of the player, so if you're chased by a monster and pass under the shop, you will shoot all over for a moment. But again, super cool entry! Well done!