This was an interesting game. I struggled trying to determine what I was supposed to do. The first two times I played it when I tried to add an upgrade I wasn't clicking on the far left part, so I thought the buttons were broken. There's no obvious button, the whole thing looks like a button. I would make the entire object clickable, or make one part look like a button. I was finally able to upgrade and add yellow slime, however, even when I pressed the "E" key, nothing happened. My guess was that I needed to upgrade more things, but eventually as more and more bees come you have less time before the game ends. It feels like this game is one where if you know what you're doing, it can easily be finished. But if you don't then you struggle and quit. I'm not sure you need a tutorial as much as just a brief overview of what the purpose is. Like "steal the honey from the bees before they stop you and use upgrades to help you" if that is what you're doing. Something.
Anyway, art all fit together. The sounds were OK. The look of the UI fit the game. I really think this game would be more fun if I knew what I was trying to do.
Thanks!
Draekdude