well...its kinda boring, the only thing you can do is score?

Well there is nothing wrong with the game. No pop-ups or spam but, the game gets boring after awhile because there isnt a "Challenge" to it.

Great game dude! I like so much the gameplay

It's honestly just too plain. It starts out hectic with no increasing difficulty, and the one-shot-at-a-time, while relevant to the Atari-style you were going for, is pretty irritating.

I think it could be greatly improved with upgrades, and a difficulty scale, starting off with an enemy here or there, rather than suddenly throwing 12 enemies at you at once the exact moment you hit space to start.

I like it, but it could improve in a lot of ways! Keep up the good work, definitely, and throw a quality, old-school-style shmup in the future! I love the graphic style and the music and I'd like to see where you can go with it.

You spelled the name of your game wrong in either the title screen or the submission. NG says: "ShootingTime", your title screen says "SootingTime".
The game itself is ok, I guess. It's simple, and good for a couple of minutes, but gets repetitive really fast. There's still a whole lot of fleshening out to do, but there's a good, solid base to start from.