Very fun and addicting! I think a lot of people are already suggesting gameplay mechanics and I think that's great.
I like the burp sound effect but it would be fun to see a cute animation of her burping after eating a powerup--maybe she can put a hand on her chest and bubbles come out of her mouth with a satisfied expression. The stronger the power up the bigger the burp? Or maybe the larger she is the larger the burp is so they start small and cute and then get big and longer as you play. Just some fun ideas for the art!