How-to-play suggestion:
- Destroy all enemies to complete a wave.
- After each wave you must choose to add a card to or remove a card from your deck.
- In battle, play cards from your deck to power up. Common cards upgrade the specified stat for the specified amount. There are also special cards for you to discover.
- Cards also add energy to your energy gauge. When your energy is exactly 11, the button to the left lights up; click it to absorb the played cards. This frees up your card slots such that you may play new power-ups.
- If your energy exceeds 11, you overcharge and all played cards are discarded.
- If your card slots are full but your energy is under 11, delete cards to play new ones.