There needs to be a way to lower the quality. I've got all my upgrades maxed, but because my computer is a bit sluggish, my speed is hardly better than it was before all the upgrades. The speed seems to be an issue for a lot of people, it would be great if this issue was addressed, other than a link to the Youtube video. But I still gave it a 5/5! Great game, super fun, and it's awesome that the developers respond to so many comments.
For some reason it doesn't all fit in my play screen so I can only see part of it. That definitely makes it harder, since I can't read the instructions or anything. But otherwise it's a pretty nice game!