Decent game but the upgrades aren't really upgrade
First off everyone complaining about sticky keys and shift. 1 you can turn off sticky keys, I can't believe people has gamed on a computer more then a month and haven't done that yet. 2 you can just hold down shift and it spams the attack at the same rate of fire as spaming the button as fast as you can.
The only problem I had with the game is the weapon upgrades kinda suck they don't seem to follow any type of progression like any successful game in this genre, usually you go form a single fire to a split to a 3 way and so on and so forth so you don't need to change your style too much and the upgrade build upon each other. Your upgrades are a totally different weapon each time and the bullets themselves never seem to get any stronger nor is their more of them or an increase rate of fire to offset that fact. I think if you worked on the upgrades and made them build upon each other instead of just changing the weapon completely you would have a real good gradius style game here.