Recs.
Updated
SpecsUpdate
Pros
Pro Beginner Friendly
The learning curve starting from the easiest difficulty levels is very easy to follow. The bullet density starts off light and cranks up when you're ready to challenge yourself with a higher level of difficulty. This helps you learn about your hitbox. Also, 1UPs are quite plentiful, letting you play longer on one credit.
Pro 2 Different Modes
Normal and Advanced modes play very differently. In Normal mode, your ship's power stays consistent through the whole game. Don't want to worry about powering up your ship? Normal mode is for you. Enjoy shifting between offense and defense depending on the situation? Advanced mode lets you do just that.
Cons
Con Scoring is unforgiving
Scoring is very simple to understand. By destroying enemy waves completely, you build up a multiplier. However, if you lose a life or let an enemy pass, your multiplier will drop by one. If a few ships make it through in a short time span, your multiplier can completely disappear which can be quite unforgiving for a single mistake.
Con Normal mode is very simplistic
For fans of more complicated systems, normal mode might be too simplistic. Your power doesn't change through the game, so you go through everything with a straight shot, a wide shot, and a temporary shield as well as bombs that drop from enemies. That's it - just 4 mechanics.