Four bad games loosely connected do not make for a good game. Also, a game with races where you can't do ANYTHING during those races? Seriously? 2/5 for the concept only.
How about making it so we can use the same cards in multiple decks? It's pointless to have multiple versions because some cards are so good that they are needed in multiple decks, so you have to swap them anyway.
It's a neat concept, but the game itself is pretty lacking. I made an identical energy 10 weapon with fire rate 9, and just kept upping the damage, along with adding more of them to my ship. If you made enemies that could only be killed by certain weapons or required a certain amount of damage, the game would be much better. Enemies that come in from off the screen would also add to the tension. Still, 4/5 for a neat concept.
Get to 20 weapon, then 80 shield, then 80 weapon, then rest into engine.
Regular waves: Be moving in a diagonal direction, but only look at your radar once you have a decent weapon. The start of a wave is the MOST IMPORTANT, go in the direction with the fewest enemies or you will probably die on the tougher waves.
Final boss: Run and kill the weak enemies first, then STAND STILL. Only move to dodge the boss when he comes charging at you.
Poorly designed. The good ammo gets wasted quickly and you can't get more money if you're stuck on a level. There's no reset button if a level is going poorly. There's also no content. This does not deserve a 4, or even a 3.