Game's not bad, but dang that 3-days goal is too much RNG. Start off with level 1 in fuels and rockets, make sure you get enough money for radar and more fuel (or e-rocket if you can afford it) and try to hit the moon on day 2. If you does that your should be good to go hitting mars on day 3 - radar, e-rockets and fuel are kings.
I am just a new player with common cards in my deck, and the Arena is already matching me with players double my bounty rank and a fully upgraded legendary deck. I surrender, the arena give me a rematch against them.