I don't think this is a bad game at all, I'd say it's a solid shooter to good, the main issue with this title is not the game itself, more of the fact this was made by Raizing back when they did make STG games and Raizing were legends in the STG genre
What I do like is how simple the game is all you do is shoot and bomb for the oh shit moments
You also only get one type of weapon like in Flying Shark which I appreciate greatly
You also can charge up a meter to gain temporary invincibility which is a very cool risk and reward mechanic
The environments are a definite improvement from both 1942 and 1943 which makes sense considering 1944 was made in 2000 whereas 1942+1943 felt like you were going the same 4 stages so I appreciate that and mitigates the tedium present in both of those
Some of the bosses are pretty cool to fight as well especially the last one
If you die you also get a chance to rescue all of your power ups that you dropped after death so it's a very fair system implemented by Raizing that is great
The biggest flaw in the game is that a fair amount of bosses are underwhelming, not all of them, but a lot of them were the same models cloned in a single boss fight
The music also feels weak as well and too quiet, it's not bad but I do feel like it could have been much improved
The environments while an improvement still feel a little underwhelming as well but nowhere near as bad as 1942+1943
The game does drag on a bit also and lasts about 40 minutes which is fine if the large amount of bosses were really fun to fight but not that much
Overall it's a good game for 2 dollars, it's not quite a classic due to the tedium that is present in 1944 but
improved from 1942+1943 in my eyes at least but feels like Raizing did phone this game in a little bit but that doesn't mean there's no fun to not be had