Thanks for taking the time to post feedback. We'll look into the problem areas so we can make balance changes/fixes to improve the game for you.
If you run into connection issues and your profile has not loaded completely (everything looks wiped) you should just need to reload the game. The way upgrades/research are stored means that once they're saved they won't be deleted. If they're not showing up it means the game couldn't load them.
The saving issues, where you lose blops you've earned on a stage are rarer, so we'll be looking into that more (as well as the general connection bugs)
The later stages (particularly 3-5) have significantly more blops than earlier ones, so if you need to farm cash I'd recommend playing those. Going for gold+ medals on the Monkey Lane stages, as well as focusing on weapon upgrades before research upgrades should also lessen the necessity for grinding.
Please keep leaving your thoughts and concerns for us.
Thanks for all your plays, ratings and comments. Some people have asked for the camera not to move with the mouse and I hear you but we consciously made the decision to float it to 2/3rd screen to allow the player to see further ahead. We did some pretty extensive beta testing on this a while back and although opinion was divided it was almost 5:1 in favor of the float, so my apologies to those who it aggravates really, hope it's not a game breaker for you.