Seeing as this is a beta-stage of what I hope to be an elaborate-finished-product, I will give you two stars for effort.
In your description, I think you should have requests for what people would like to see in this game, if feedback and suggestions are what you are looking for.
Suggestion-wise, I think there should at least be the following:
-Choices! You are off to a good start, offering different outfits for your current monster, however you need more 'monster' choices! If you're starting off with cliche-based creatures (since your first is a zombie), the following could be vampires, werewolves, skeletons, clowncreatures, etc...
-Upgrades! Along with the options available for nurturing your monster-baby, I think you should be able to accumulate points which you later spend on upgrades or customizations that make the game more fun/addicting.
Suggestions: For aesthetics, it'd be nice if there were portrait options, nothing super fancy, just a male/female portrait for each race, and your race/level would be displayed in the top left or bottom right portion of the screen. Also, adding potions (to the shop) that can be used automatically once your health bar reaches a certain point would be nice. + if you're interested in these suggestions.