First slide needs to be longer.
Is the cloud our official logo?
Last slide is upside down, that was distracting
Don't make it too regular - some slides (more text) can be longer, some (less text) are good as they are. Still it is important to keep it all tightly to the beat, just more like to 8-s or even 16-s, not just 1, 2, 3, 4...
Also you could include some photos of real cards.
Possibly, if I could dream a bit, also few shots in an inn/tavern where the game is played (and smiled girl playing it with a handsom guy).
Music is good, slides are acceptable, mermaid twice in a row was maybe not that good, so maybe mixing something in between would make it better
Your beloved Q_x, the tasmanian devil