Strike Suit Zero is a fairly pretty but poorly executed game. Little thought was put into what makes a game fun rather than frustrating. You will most likely spend half of the game trying to accommodate its awkward control layout and the other half regenerating your shields.
The controls aren't at all natural. It will take a few levels until you learn to adjust to the clumsiness of it all. Once you do you'll immediately be hit with a completely different control scheme as the "Strike Suit" mechanic comes into play, turning your space ship into a powerful mech warrior. The transition between control schemes is jarring and hard to get used to, I'm not sure I'll ever really be comfortable with the switch.
There will be times when the enemy A.I. will play dirty and seemingly cheat. They are incredibly accurate and agile, with the ability to stay directly out of your line of sight no matter how fast you turn. They can manage to fire directly at you at a 90 degree angle from hundreds of metres away and hit every shot. They will also often fly in groups, sometimes four or five abreast, in order to take you down. Meanwhile your team mates are miles away fighting their own one-on-one battles.
When the time comes that a mission requires you to carry an extremely valuable payload with a disadvantaged vehicle, you will often have to "lone wolf" the entire mission. On the other hand, when you're in a capable enough vehicle, you're often tasked with protecting similar ships in similar circumstances. For some reason when it's your turn there is no one around to help which is incredibly unfair as you're left to pick off the enemy one by one with a less than capable ship when it shouldn't have to be your job.