Story - Radioactive dinosaur that rampages in the city
Mechanics - Good, tight controls that promote spamming. Easy to accidentally jump/stomp without meaning to but the addition of huge numbers of buildings promotes that chaos. Charge and stomp are nice but by the end of it the screen is filled enough that just spamming seems to be more effective.
Aesthetics - Cute designs, good sense of color. The bright radioactive green stands out against the somber violet palette. Coloring the enemies with copper/brown/red tones also helps distinguish them visually.
Technology - Good responsive engine, tight hitboxes, satisfying mechanics.