Nothing bad, but nothing great or unique about it.
This is a top down platformer aimed at children 5-10 years old. It's difficulty level is around Kirby (excluding bosses), Drawn to Life, or the Lego games. Experienced players won't have problems and will probably find it boring. Get it only during a good sale.
There are 16 stages that can be completed in about 10 minutes each. There are several hidden bonus rooms if the player searches or deviates from the main path. There are 3 weapons: a mallet with spring-loaded boxing glove, anvil dropper, and umbrella that slows falling and protect against anvils. Hazards include moving platformers, trampolines, dropping platforms (Donut Lifts), collasping bridge, catwalks, very tiny platforms, crushers (Thwomps), fast conveyer belts, and all of the above over bottomless pits. Death results in being spawned in a nearby location and the loss of some coins. There are 2 maze levels, some switch puzzles, and 3 bosses. The bosses requires some pattern memorization or tell/cue recognition.
There is a moderate level of character customization. You can be a dog, cat, horse, or chicken. Each has 8 skin pallets. There are about 20 clothes for hats/wigs, gloves, shirts, pants, shoes, and backpacks. There are male and female casual clothes as well as costumes such as princess, priate, vampire, scientist, and more; referecing Warner Brothers cartoons. All of these are purchased with coins or found randomly in stages. (I purchased this game mainly because I like paper dolls, (guilty pleasure). I was pleased with the selection. My only dissapointedment is the lack of pallets for clothing.)
Graphics - looks nice, cartoony with Merry Melodies aesthetics.
Sound - about 5 jazzy songs consisting of apporpriate but not memorable music
Controls - controls are solid but the player moves rather slowy
Misc. - I have no experience of the closed broswer MMO "Cartoon Universe". Credits state that this was developed by Wayforward, but there are several other departments such as marketing, and Warner Brothers staff, etc.