Ingenious idea buffing the grenades. From a game design perspective, it really really works. I would have added maybe three choices later on though, because it gets extremely unfair in the endgame. Theme wise, I think the game fits really well, though I think there should be a way the boss beats the player, especially to make it so that the spider is actually a boss. 

I'm not sure I like the take on the theme because normally a "final boss" is pretty powerful. Here, it seemed like you just made the "player" a boss and the "boss" a player. Technically still works but gameplaywise, it doesn't change much from the original roles. the game is decently fun to play, but the balance is off: Way to easy to start, and gets hard quickly. Great presentation though, and still impressive considering the time window

There's a good basis for a game here, and the art looks great, but as is there's not enough to do