You are the first one to report wall-jump glitch. I'm sorry that happened. Even though I'm aware that there can be some occurrences where the wall jump does not work properly, but that should be under 1% and it should only give higher upwards momentum. It can still be the case that somehow the game isn't compatible with your device/browser. (Heck, even I could have left a big unintentional bug in it.)
Thanks for your feedback, I wanted to, and will definitely do something about the bugs, I even had an idea for it, but I ran out of time. I barely managed to pull all the things together. You can notice quite a few cut corners as well.
After all, I'm glad you liked the concept and the execution! :)