Glad you liked it! And I'm glad your existing tools worked. I'm using web technology for the graphics, without otherwise forcing color schemes and such. With a larger team I'd get screen readers and the like to work as well, but for now it's good to know that this is working without much additional testing from me.
Most of the issues you mention were intentional to give the game more of a puzzle aspect and/or challenge at the end, without making it tedious. But I agree there's a lot of room for improvement there, and these comments have helped. I'll need to get lots of people to help test if I do a longer-form game. For a short one like this, there was no time for refinement.
I'll keep this idea on my list of longer games to make. Though my amount of time for development is uncertain at the moment.