“It’s old looking and not good” is not legit feedback. Fellow authors, please refrain from wasting everyone’s time by writing stupid sh*t that isn’t helpful to anyone. The way you give feedback is “it’s bad and here’s WHY”, or “here are some specific things that could make it better”. Saying “it’s bad and should be better” or vague stuff like “should be modernized” is NOT HELPFUL, so stop.
The animation itself has some ‘weird physics’ going on. The third bounce slows down way too quick, it should maintain at least 50% of the original velocity. But i like the idea and if you get your third bounce correct, and maybe center the whole animation a bit better (currently it’s leaning too much on the bottom part), it could work.
The main reason it looks “old” is because you’re using shadows. “Modernizing it” would mean simply removing the shadows, and keeping everything 2D and flat.
The colors don’t work because they’re way too saturated for today’s trends. People generally prefer more desaturated and neutral colors. Your background colors especially should be close to grey, so basically just heavily desaturated.
Anyway good luck, that’s my 2 cents!