Hey there. Daniel here; big fan of your game so far. I've gotten to try it at 2DCon and GlitchCon before, so I jumped onto your offer of beta access. Thanks for letting me trial it!
I'm happy to report that I finally had a chance to play the beta tonight. (My apologies that it took me awhile to spend time with it.) My roommate is a coworker and fellow gamer, so I planted the idea of trying Joggernauts a couple of weeks ago. We had some free time this evening, got our Xbox 360 controllers paired up with my PC, and went to town with 2-player mode.
We played until exiting each map once. Didn't run into any bugs or issues that we noticed. (If you'd like my system specs or anything, just let me know.) We achieved 100% collection or both trophies on a couple of maps -- but never both at once. Didn't clear a bonus map either, but things seemed as expected with what little we experienced of them. We saw hidden areas and the spiky worms that will hurt the matching color player (those were new elements to me with this build).
My friend really enjoyed the game too! Seems like everyone has some fun with it. He was surprised with how much coordination it can require to do everything perfectly. I'd agree with that sentiment: considering how simple the concepts are, the execution has always presented a greater challenge to me than its surface appearance.
His first feedback was that this should support character mods. He wanted to play as other jogger skins. Thought I'd let you know!
Anyway, thanks for reading. I wanted to post to make sure you knew that the beta didn't just disappear into a black hole, heh.