Co-op connection issues
I'll just start by saying this is probably not a bug, however I feel it's something that should be addressed since this game is more marketed towards the "Co-op" aspect of the game now.
When I'm playing Co-op endless with my friend, we get to a point where there's soo much going on in-game that the game begins to stall and say one of the players is having a connection issue, and waiting for them to catch up. Every time this happens, if 5 seconds pass it just auto ends the game and sends both of us back to the stage select screen. Neither of us get credit for the wave we got to, and neither of us get the skulls we earned up until that point. I've already done Co-op endless three times now, and have gotten no credit for any of them because the same thing happens. I'm honestly considering not playing Co-op endless again until I see some changes...
So two things I feel should be addressed:
First, there should be more than just a few seconds of leeway time for someone who's lagging to catch back up before the game ends. I would say at least 20-30 seconds would be a good amount of time that would allow most of your player base to not get kicked from games, and it's not too long where the other person is just stuck doing nothing. 5 seconds is just not enough time.
Second, if for some reason a person is not able to reconnect, instead of both players being sent straight to the stage select screen, it should automatically bring the rift points to zero and count as a game over. This way both players can at least get credit for what they've done by getting their scores on the leaderboards, and also allows them to get the skulls they earned in that match. If I get to wave 43 and then the game gets lagged out, I should at least be getting credit for that wave 43, and not having an empty score.
Just some food for thought.