Diamonds n’ Flags is, in summary, quite a boring CTF level. The author shows some basic knowledge of properly designing the landscape and placement of eyecandy and items; however, the level is more or less linear. And surprise, it uses Diamondus.
There is a cavern twisting up and down to the northwest of the map with a lot of random items placed rather closely together. This would probably make blue’s defense advantaged compared to the red team, whose base is located in the southwest in a large expanse. There the only natural formation promoting defense is a small triangular knoll (wherein lies the coin warp’s target and an rf powerup). There is a also a single tree a bit to its right, with one very long stem and a perpendicular branch leading out from either side, springs leading you upwards towards the narrow blue base or left towards a large floating arrangement of gold coins. These coins do not regenerate, mind you, so good luck getting into the warp (which lies directly under this stash of coins) after the first time.
So the red side has a lot of coins that do not regenerate, weapon 9 and bouncers. The blue side has seekers, bouncers, and rf’s. The northeast corner has a fire shield and some more gold coins. There are at least two carrots. It’s obvious that /some/ thought went into things, such as the bouncer powerup directly by the blue base (which is above what becomes a pit), but you can only get it with weapon 9.
In summary, the level looks meh, about average or slightly below. But there is potential and you’re on the right track, so keep trying to improve and experiment and I think you will see some results.