It's a really cool concept! Totally understand it's a quick turnaround. Things to think about as you continue to work:
Visuals are really cool, I think you could definitely go all out with some effects and have it feeling really good (especially with some more audio). The first time I used the shield card I started to picture what a fully juicy game could be. I know it's supposedly bad VR visuals, but i think a TEEENSY bit of screenshake (or even just shaking the ship below you and not the player) would go a hugely long way.
For the game design, it's obviously crazy to balance a CCG in 48h. I'm not a big card game player, but it seems to me that just adding one more thing to keep track of would really bring the strategy alive. It seems like there's the beginnings of an energy system there, so even just adding a Charge card to add energy for the next round and allowing for multiple cards per turn would be amazing. But I'm sure there are plenty of great examples from the CCG world.
For tray-table-ability, this really fits the bill! It would be cool to see an iteration of the control scheme where you could actually hold your cards and push the big red button with your hand :)
Fully fleshed out, I could see this being an awesome game for a long flight. I can't wait to see where you go with it!!