Hi Bardon! :)
Of course, it's completely up to you to choose which games you'd like to publish on snackR, you can publish as many as you want , including the ones that you already have, as long as they are compatible on our platform (HTML5/Unity file Format) and preferably in portrait mode, although Landscape is fine as well.
Coming to Genre - Any kind of Casual or Hyper Casual game does well on our platform, again we have no limitations and the creator has complete freedom over their game, let your creativity do the talking ;)
Would love to discuss this further, Bardon! If you prefer, we can talk on discord as well. Here's my ID - emix_x5520
Hoping to hear from you soon!