I don't know if more people are having this, but I'm having serious issues playing on the pc. For some reason the characters will often not respond to me clicking in the game and the cassette tape in lvl 5.1 is not responding at all. I'm playing in Chrome, is that maybe the issue?
Something that I can across while playing: By the time I had my fourth multiverse breach I started to wonder, what exactly the production merits of each upgrade are. But it isn't mentioned anywhere in the game with how much each upgrade boosts your tangerine production. So, maybe an idea for improvement is to make something like hover-over pop-up sort of menus, so that when you hover your mouse over the upgrade you can see with how much the production would improve if you did the upgrade? Maybe I'm just being a nitpick, but I thought i'd mention it anyway.
On a different note, gods I LOVE your game, it is brilliant to just let it run in the background while doing housework of stuff for school <3
It happens to me that if you don't interact with the objects in the game in a VERY specific order, the game refuses to progress. I had to restart at least 3 times because I messed up the order of the interactions. This is seriously a little annoying. Perhaps fixing this in the next game would be a good thing to do!