Firstly, hi! It’s great that you’ve joined us and want to share your creations. 
Secondly, whoa! That’s a very big picture! 
Do you think you could try uploading it at a smaller size, so it’s easier to see without having to click on the link? It’s not a big problem, just makes things a bit more user-friendly.
Aside from that, I really like the character itself. The expression on his face gives him a bit of character, as does the slight modifications you’ve made to the basic stance. Experimentation is great! Normality is boring.
The bold, bright primary colours (yeah, I’m British – deal with it) make him really noticeable, especially against the plain white of the background. However, one issue this raises is that, while the cape does a really great job of creating a balance between the top and bottom halves of the character in terms of shape, it doesn’t seem to fit with the rest of his outfit in terms of colour – it actually seems to blend in with the background. This is made even worse by the fact that it isn’t really attached to his shoulders – it peeks over the top – and it looks like he’s standing on it! You could solve that one by resizing the cape slightly, making it a bit smaller so the top is hidden behind his back and the hem doesn’t drag under his foot.
Speaking of the colours, I think the combination of red, blue, yellow and green is a very bold choice, which does actually start to hurt the eyes after a while. It might be better to use multiple shades of just two colours, which would also make the character look a little less flat. For example, you might replace the red with dark green, and the yellow with light blue, leaving you with just greens and blues.
As a final point, I notice you’ve named this thread after the character – or is it the other way round? – but you might want to think about making a collection of all your characters, rather than starting a new topic for each one. That will not only make it easier for other people to find your characters, but it’ll avoid cluttering up the gallery with lots of small topics.
I think that’s about it. (Sorry for the loooong post) As I said, I really like this character and I think it’s a great start. I hope to see more of your creations in the future. 
