hey
Nice work, it's a start

.
Anyhows I done an edit below.

Firstly, I thought the character was to large/tall, compared to the enemies I've already started, and such I made a tad smaller. I also changed the shading to my liking

, for me it would be hard to animate otherwise. BTW, I don't mind breaking proportions or whatever, as this isn't meant to be realistic or anything. Hmm, well the size doesn't matter if it's just concept art, and it'd probably be wise to pixel at whatever size you prefer for concepts.
Well, I think your character looks to be a stylised viking, looks to have some cool goggles of sorts, hehe

. Hmm, I seem to have turned it into some sorta space man, hehe. I'm not sure about this character, but it's cool to show your visions and such, and maybe we can develop from this or something.
But yea, I removed the sword and helmet spikes, cause I don't want the main character to represent danger, or umm... destruction in any way. Hmm, I myself don't want the player to have any weapons and such, nor beable to attack directly. Hmm, if you don't agree with this, then maybe we can figure out something.
Anyhows, I think the more ideas and concepts we have the better

. You can always use them in future projects or whatever.
cyas