Ha, yes! I beat Spelunky! That was awesome! Proof:
Now I just need to seek out the secrets and I can safely call this one finished.
Even if i put the game down, I have to realize that this is still an incomplete game, and when Derek Yu finally finishes it, I'll feel compelled to pick it up again and beat it just to see the tweaks he made. He's already made a great game, very little needs to be changed.
If I had to say though, i'd say that swimming needs tweaking. Jumping out of the water can be very difficult, especially in the "you hear running water" sections of the Jungle. Damsel handling also needs some revising, especially when picking up the kissing booth girl and inadvertantly pissing off the shopkeeper. The totem pole spike traps are also a big kick in the balls, If you don't have some method of circumventing them entirely (spring shoes, jetpack, bombs, etc) then you it is VERY likely that they'll kill you if you try to climb over them normally. Also, Getting a dark level during the last area is a literal death sentence, those flying spike traps are too plentiful, too fast, and too deadly that not being able to see them ahead of time practically guarantees your death. then again, I never got the..
Of course, their are bugs that still need to be ironed out. The "Damsel in a wall" glitch, the "short-fall damage" glitch, the "stunned forever" glitch, just to name a few.
Lumin mentioned that Derek Yu made some other games, think it's a good idea to check those out too?