First I didn't get the controls at all. It took me five or six times trying to escape the room not getting through the locked doors to the next level. Eventually I started running around in circles and thought this is quite good and evil if this is the point of the game. But that's when I took the mouse in my other hand and realized I could shoot. Yeay!
It's a hard game but you get the hang of it. Quite addictive and I think the Game Boy aesthetics fit the formula. A nice entry to the jam.
The best part is the randomness of the levels. You always meet the same enemies for the first 3 rooms but the rooms and its power ups are different on each play through. I liked that. Good random.