It was pretty freakin' nice
The game was well polished and didn't feel too cheap and the bosses were fun to fight. It had a nice retro style, with a nice bit of challenge. I finished the game after about 50 tries on a couple different levels (mostly on the 2 black hole levels; it took me a bit to realize all I needed was anitmatter cannons to win).
+ Overall pretty fun, and a couple of "Oh snap" moments made it interesting.
+ The final boss was one of the most interesting bosses I've fought since I played Sin & Punishment (Wii Virtual Console port).
+ It was challenging, without being too challenging. It was between the difficulty of a typical Newgrounds shooter (easy), to something like Gradius (hard). Not too hard, not too soft.
+ Multiple weapons to choose from...kinda. Most of them were just variations of others, with the exception of the homing missiles, rubber bullets, and relentless rifles. And once you got to the end, there was only one thing to choose from, and that was the only thing you could use without raising the difficulty.
- Some (read: A lot) of the enemies were really freaking annoying.
- The ships popping up from behind or rushing in suddenly (like the drill boss) made things really stupid. This was countered by the levels being kind-of short, though, so I don't consider this to be a real issue.
- The last point made in "+" above.
Last, thing. This isn't freaking Ikaruga. It isn't Touhou, or Gradius. If you think this is hard, play any of those 3 games and videotape yourself so I can see the results. Either you start literally crying, or your balls grow on the spot. Either way it will be pretty amazing.
4 out of 5
Very nice overall, but some of the enemies were frustrating enough for me to take a point off. Too many deaths at the hands of enemies that pop out and do 100 damage without me being able to react. Unless I did the level before.