"Righteous BFG" lmao. What a great game, by far the best submission on this jam.
Here is a bit of critique:
1) by far the worst part about the game was the enemies shooting off-screen.
2) the BFG really lacked the impact - I'd love to see some bullets or something
3) at the start of the game when you click "I'll give it a shot" during the fade-out the button is still clickable, so one can click it again and again, causing the game to repeat the fade-out again and again. Not a bug, but a feature, I guess :)
You can take a look at "Enter the Gungeon" for inspiration and to look at how they do things.