there should be a spelunky hard mode

[orange08]

an extra difficulty mode where everything is super dangerous,
I'll provide some specifics for ideas:

-bats fly 2X faster
-snakes sometimes dash towards the player
-spiders don't sit on the ground for 2 seconds anymore, they just jump up again the instant they land on the ground(like they do in spelunky classic)
-mother spiders spew 3 web blasts at a time
-powder kegs explode whenever the player touches them
-cavemen can see backwards and sense when the player is standing behind them
-arrow traps shoot 3 arrows once triggered, one is aimed normally(like at 0 degrees), one is aimed at 20 degrees, and the last one is aimed at -20(aka 340) degrees
-arrow traps can sometimes still have more arrows, and be triggered a 2nd time, even after they've been triggered once :3

-shops are guarded by 2 shopkeepers instead of 1
-shopkeepers can do a 2 round burst shotgun blast(1 shotgun blast followed by another a few milliseconds afterward)

-frogs jump faster, meaning they don't spend as much time taking a rest after each jump
-explosive frogs explode instantly once damaged, meaning the player can no longer just jump on their heads
-poison bubble spewing snails spew 2X as much bubbles, some of which go more horizontally than vertically
-monkeys always take a live bomb from the player
-boomerang cavemen also chase after the player while throwing their boomerangs(currently they just stand still to throw their boomerangs)
-mother frogs can give birth to 2 frogs at once instead of just one

-man-eater plants chase the player, instead of just walking back and forth

-yetis carry rocks to throw at the player and also chase the player when they see him
-mammoths freeze ray goes a bit farther
-ufo can shoot sideways at the player, also moves faster

-Ghost appears on a level at 2 minutes instead of 2 and 1/2 minutes, a second Ghost appears at 4 minutes

It will probably never happen, but I just thought it would be even more fun to watch people play the game if it was like that.

[SuperZ47]

a second Ghost appears at 4 minutes

Ghost runners wet dream

[aloe]

Check out Frozlunky and use "hardlunky" as the seed. It's not exactly like you're imagining but it's still a big increase in challenge.