Great artwork, but loads of missed potential.
I have some suggestions. But first..
Cons:
-It's just another generic blackjack game, in which skill has very little to do.
-She doesn't fully strip, nor is there any point to going through all the effort to do nothing but see her fully stripped if she did. The reward isn't worth the tedious, repetitive process involved to achieve it.
-I don't understand why she can put her clothes back on whenever she wins a hand, but the Player can't. That seems silly and unbalanced.
-It's just a static image, the character is pretty lifeless and doesn't interact with the Player at all apart from saying a couple of set phrases like 'Ooo I won' and 'Too bad, you lost'. C'mon, give the game some more personality. Animate her more and give her more to say and do!
Pros:
-The only saving grace here, really, is the lovely artwork - which doesn't fulfill it's potential or it's point unfortunately.
I would like to see more from you, however. But in your next game, shake things up a bit. Maybe show her actually taking her clothes off in an animation. Maybe add a 'Flirt' feature in which you can banter coyly at each other between hands.
Maybe while you're playing she's actually sitting across the table making little faces and gestures at you or peeking over her cards.
And, of course, as I'm sure everyone here would love, something beyond just stripping as a reward. Am I right? ;)