If I want to play the game regularly at 8:00 PM Pacific, I only get the game guests every 48 hours. This is due to the way the timers work. At some point it goes from 24 hours to 24 hours + remainder of current day. Now it's 9 PM, and I'm in the same "27 hour window," from yesterday which isn't reset until 11 PM here. I'm not going to stay up that late. Tomorrow, if I wait until 8:00 PM to open the game, it'll be another 27 hour window, causing another 48 hour cycle of quests.
One problem I see with the achievements is that it is significantly difficult to achieve the "bronze" medal achievements later in the game. I keep getting gold medals, which do not count toward the "bronze medal" achievements. I somehow have to find a way to play poorly enough to get a bronze medal.
Please set it so that space always will restart the level. I would prefer not to move the mouse and click "launch" every time. Also, there's seems to be a bit of shadiness, with the mouse cursor ending up on "Like Armor Games" every time.
I was able to return to the village of Castaway by pressing up at the point where you start the first level. I haven't tested in detail, but I attempted to do this after completing the first quest. That may be a requirement for getting back.
I found that the only way to get through a mission on time is to crash into targets when you run out of bombs. This serves two purposes. 1) You do damage to bomb targets when you crash. 2) You start off on the ship, saving round trip time. Doing it this way, I completed the final mission with 7:00 minutes left and 22k+ points.
 "Animation Throwdown"){kind=icon}
 "BioGems"){kind=icon}
 "Run From the Sun"){kind=icon}
 "Castaway"){kind=icon}
 "WhiteboardWar: ChopRaider"){kind=icon}