Thanks! By pressing shift, you are supposed to consume blood from the tank to boost the speed that the conveyor moves but unfortunately it seems to not work in the HTML version. The windows download works with this feature, I'm not quite sure what happened with the web export since I exported them one after the other.
I'm glad you enjoyed it though! :) Thanks for the feedback, I do hope I can find the time/motivation to come back to this game after the voting period and tweak it.