This is actually a really fun concept. It definitely has the strategy aspect you were going for. Also, has pretty impressive animations and art for something done in a week. You did a good job of picking actions that flowed well together. Superkicking an opponent away, waiting for them to charge in, then jumping and landing right as they get under you was pretty satisfying. This could have the potential to create really complex looking fights between two people who spent time planning for their moves.
Suggestions:
Fully aware this could have been a technical limitation, but I'd be interested in seeing the actions play out at a faster speed. And if not during a fight, at least during the replay. It would be interesting to watch the fight back a full speed.
Saving multiple replays.
Customized Loadouts.
Letting players rearrange cards.