I have to say, Jetpack Man seems extremely op compared to everyone else. You can shoot as you're flying and take out blocks directly above you in one shot, you don't have to worry about block height to get the invincibility star, and his lack of speed can actually be beneficial for more accurate movement.
I also like Beezleblock Jr. since his jump height is very good as well as damage, but I still don't think he's better than Jetpack Man. The online highscore that I got on the first level (which might be gone soon) was only because Jetpack Man can easily get quick points then fly up and get the star.
I also wish it showed the leaderboard scores with the outfit people were using like the local leaderboard just to see what people were using.
Overall, I'd say my top 3 favorites are Jetpack Man (being the best), Beezleblock Jr, and Cape Man.
Bottom 3 would be Rocket Man (the worst, absolute
), Ninja Man, and Dual Wield Man.
Cyborg Man was cool at first, but he destroys blocks too quickly, so he leans towards the bottom. As for Fighter Man, he's not really good or bad, but I'd put him leaning towards the top.