This was the first type of game I ever made. Back in high school, I would make little BASIC games like this on my TI-83 graphing calculator and uploaded them to ticalc.org. It couldn't handle graphics well without knowledge of assembly code, so the types of games we could make were limited. I sure tried, though!
I forget if it's optimal to start with 34 or 50. It would be cool if GuessR would rate your performance compared to optimal play. If you get the login system working, I'll jump in and play some rounds.
So, like, I'd start with 64, then play either 32 or 82? Now I kind of want to automate this and test a bunch of strategies for finding a random whole number from 0 to 100. I thought someone said dividing the remaining possibilities into 3 groups was more optimal, but I forget how my testing went.