S.S.Bagel went through many revisions in its former form as East Bagel Ship. Certain weapons like the Launcher were ridiculous. The repair block required adding cool downs to the engine because no matter how I tried I couldn't nerf the damn thing.
You might have your own ideas about:
- Cool down timers - from bullets to how often bugs lay rocks.
- When you should encounter a block (bear in mind a game should progress not as a slope, but with spikes of activity and recovery).
- The availability of fuel.
- Better tactics from large enemy ships.
- Bizarre wild life.
- A new type of block or better version of an existing block.
Be as ambitious as you like, some ideas might just be crazy enough to work. I will also post ideas - more mechanics generally involves a lot of nerfs and boost to other systems (I've just added mines at the time of this post and you can totally confuse the AI with them).