I love the circus. Can't say the same for this game, though, as it's more Criminal Space than Circusy, as the main goal of the game seems to rely on needing to get enough circus performers to cramp themselves inside of one ship just to shoot one other one.
I really liked it when I first witnessed a Juggler pop out of the portal and do a little circus act for little ol' me. I liked seeing all of the acts do their thing as they walk into a pipe for them to go along their way. I think the game could've been a bit better if it had focused on something along those lines, of spawning thousands of circus acts for them to go inside of an orifice instead of having to wait a long while for the Tickets to increment until you're able to buy a new one and see it once again.
Aside from all those things, the game is simply made, with a crude UI, stock images taken from a royalty free source, and music that doesn't loop. Simply put, it's a bit dull when compared to the bright lights and wondrous appeal of a real circus. (or something inspired by it)
However, it's absolute simplicity reminds me a lot of a mobile game you'd randomly find off the mobile app store. The only thing that's missing is a 30 second unskippable advertisement that plays every couple of minutes.