Neat idea, although yeah ending this mostly active game on an unskippable 25+ minute wait with nothing to do aside from click the +researchers button is a really anticlimactic end. I can't imagine how painful it is if you opted for the blatantly incorrect +100 researchers option early on. If the game just ended around the time you unlock the get bought research, the +100 might be a comparable tradeoff, but now it just looks like a 'haha you didnt read the description properly and everything is slower now' trap.
Additionally, having the researches be manually assigned is kinda a weird mechanic anyway? Given that money can only be spent on 2 other things in the entire game and both cost negligible amounts of money so you'd never need to precisely portion off a fund just for them; So hitting the +researches button just feels like busywork.
Still, the game is really well carried by the neat premise and gameplay; Just would probably have benefitted from the "Oh I have everything well automated and now its just the numbers going up while I wait" being sped up a little, and the final 25+ minute wait be like literally decimated.