Pitfall!

love you for remaking this game, but not sure its completable. i managed to get to jump accross all the crocodilles a couple of screens to the right, but instead of landing, i fell through the ground forever and had to restart the game. happened 3 times

I hit an enemy once and lost 2 lives.

When swinging on a vine over a tar pit (stable) with 2 rolling logs, you are too low, as the logs will tag you, pulling you off the vine.
Oddly you don't sink into it, but get pulled back onto the vine, repeating the process.