Had a absolute blast playing trough this, easy to pick up but hard to master.
Picked this game up in a bundle but would have bought it separately retrospectively.

Arcade mode is fun and casual but gets hard fast and with only 3 lives it's a true coin eater.

Mission mode has allot going for it, variety of missions and some tough as nails.
Took me some hours to finish the hard boiler mission.

I do think the game is mostly meant for people that feel nostalgic or are really into beating hard twin stick shooters. I feel i got quite good at the game after quite some hours but sometimes it feels like you just need luck.

Only cons so far seems the lack of updates and bug fixes, mainly audio problems.
But this does not ruin the gameplay at all and is just a nit pick.