No, I didn't design this game to torture players (too much)... but this is a game that will not hold your hand as you go through it (or when you start). I am sorry if you're against the design choice, but for this game (type and length) it makes sense. However, I feel like in this case it's a problem of the [don't move] section on your end since you're unable to beat it even once (as far as I understood). I spent the entire yesterday thinking about how to improve the [don't move] without making it drastically easy. I could make it so that the game keeps track of how much you're losing at the [don't move] section, and every time you lose it will get 5% easier (at least on EASY). However, if you reach a certain percentage of help, the game will punish you in a way (just in case people take advantage of the help they are getting).
I'm glad you got the hang of defending yourself in-game (some people didn't know how to use defensive items at first couple playthroughs). I checked my mouse settings: pointer speed is set to middle and [Enhance pointer precision] is toggled on. In case it helps, the "dot" in [don't move] section needs to be kept in the middle for maximum survival chances. If you drag it near the edge, there's a chance it could jump to that nearest edge. Good luck and let me know if you made it through, I have my fingers crossed. :)