After reading some of the comments I decided to ask my 5-year-old niece to come play test this with me and we had such a blast! I love how you've made a game that is easily accessible to even very young kids. I'm very wary of a lot of the tablet games that my niece and nephews have on their tablets to the point where I periodically have to uninstall a bunch of them because they just not age appropriate. Your game on the other hand shows that you can have fun and still be wholesome for all members of the family.
Controls felt responsive and well tuned, music track was a banger, sound effects were crunchy and did a great job affirming input decisions. The second stage was particularly fun with the spike ball in the middle and the spring platforms. I absolutely loved this!
P.S. Sweet profile pic from Zombie Ate My Neighbors ;) One of my fave games growing up in the 90s