I'm currently at a 7.3 modifier, the biggest things that I have issue with are the hobbies and how long they can take. Something that also gets me is how long it takes to get access to the "Lucky" hobby to start earning automatic hearts for Quill.
The offline bonuses button for Mars when entering from Earth and the Moon barely responds.
It takes several attempts to click before it recognizes the clicking and allows me through.
I'm actually having issues with Level 49, it seems one of the pieces for the leg has fused into the base piece and glitches out whenever I try to move it. Other than that, this is a pretty relaxing game.
 "Crush Crush"){kind=icon}
 "AdVenture Capitalist (Final Mars Check - Closed Beta)"){kind=icon}
 "Shape Fold Animals"){kind=icon}
 "AdVenture Capitalist"){kind=icon}