Wooo, it's nice ! I just found some effects like bullets and explosions to be... hard to explain. The sprites seem to have a resolution too big compared with other things like player ship, enemies, bosses and city decor that are more united.
Some things :
- Clouds could (could cloud colud coudl cuodl...) have a smaller palette with more contrast.
- The explosions could have brighter color and more contrast, and additive effect with background.
The game seems really cool to play, fast paced, with a dynamism that reminds old crazy shooters, like Thunderforce. Music is space funky, like you're a knight of the sky in the future sliding on the horizon. And your kids contribute ! And you have a new house !
Well done !