Very nice game. Simple and challenging alike.
The music is perfect and all tracks play well with the mood of the game. Being able to unlock the music was a nice move, aswell as the achievement system and I liked particularly having an achivement for going through the controls. Its not something that you get to see out there that often but its always a nice touch. The background and graphics are perfect and I loved the fact that every retry, the space under would keep changing into something new. It made each try feel anew and as a whole different challenge.
I played your game for 1:17:34 and was able to use all three ships. The only two achivements I didn't obtain were the one for surviving 2 mins and the one from the blue ship to destroying meteors with Max Power.
The first ship was the most balanced one and it seems to be the strongest aswell. Everything works nicely with it too. I found no problems with it nor its power ups. I found it nice that the bombs could be stacked up, so I made the most of my first 30 seconds for it. Eventually, too many asteoids come along the longer the game progresses and it fires off too quickly, turning into a not so strong ship at that point. Never the less, quite versatile.
The second ship, despite being larger and slower, packs a great advantage with the phase power up. Although, unlike with the small ship, it seems to not be stackable. While on "phase" you can't pick up other power ups or even shields. Another issue with it is that after picking a power up, it takes around a second for it to kick in, making the ship still vulnerable. Other than that, it was the one I lasted the longest. Around 1:30~1:35 with it.
If those are intentional, then cool, if not, be sure to look into it.
The last, the blue ship(after playing for an hour) was pretty interesting. Its the hardest one to turn about with, but the speed works great to race up the fastest asteroids. Despite so, I wasn't able to last longer than a 1:15 more or less with it. The lack of health makes up for a challenging ride but the use of the power up was quite impressive. Just like with the second ship, the power up doesn't stack up, or atleast not correctly. I believe that if one gets lucky and is able to get them one after the other, reaching the two mins wouldn't be too hard.
The only flaw I found with it is that asteroids can still hit the ship from the rear. Not sure if that is intentional or an error.
Along my gameplay I went through every corner and side of the map and found no safe spots, as overtime, eventually meteors come and go in all directions.
Overall, its a very nice game, quick, challenging, frustrating at times, but that's part of the fun of it. If any suggestions, I would recommend to give the player an "extended life" if they are able to obtain shield pick ups while having a full shield.
Keep up the good work.