It's called Dogurai, and it's a pretty decent platformer if you ask me.
I mean, the sprites are great, the tunes are decent, the game emulates the graphics of the first Gameboy (which is neat)... And it's being developed by a couple of brazilians!

This is just awesome, no joke. Brazil is still a fairly fragile market when it comes to game developing, so even if it's a platformer with 8-bit like sprites, it's still fairly admirable, I really liked it! In fact, I think I did a fanart of the main protagonist at some point, but I apparently lose it.

The beta is available for free here: https://goo.gl/2RSSHb
I heavily recommend you to check it out and pass a feedback for either one of it's developers (and donate if you can):

 mockthebear
 guax

Also, I meet them in person, so they are great guys to chat with.
Points for Guax for making tose sprites on Paint... That is awesome!

I guess that my only major complaint is the platforming, the double jumping can be improved.