Wow, this one's incredibly short.
I like the retro space-invaderish art style, I got hit with a huge wave of nostalgia.
The only small issues I faced are mainly the player controls. The gravity is too much and it makes the feel of the gameplay a bit too forceful. The small concept of exploration as seen in many metroidvanias is still present in the game, but this feels more like a small puzzle a player has to face on his journey through the game.
Nevertheless, it's still a pretty cool looking game despite how short it is. Maybe ease up the player's fall speed a bit? And later add some more levels to explore, and I'll definitely be the first in line to play it. :)