Don't include unsupported stuff. Don't hint at stuff that isn't there.

I just now completed Microbe Kombat. Spoilers ahead, insofar as this game could have spoilers.

This is a game similar to 'Feeding Frenzy' - avoid larger microbes and eat smaller ones. Red dots appear at regular intervals and whomever eats this - freind or foe - grows larger.

In the tutorial, the game mentions the 'extra abilities'. Most - stunning nearby enemies, being able to kill larger enemies or extra speed or size for a brief time - are obviously useful.

Two, however, seemed to have an interesting risk/reward system - splitting into 2 (diminishing your size whilst doing so) and exploding one microbe to destroy nearby enemies.

Suffice to say that I became increasingly disappointed that there never seemed to be a great time to use these abilities - I was eagerly awaiting some clever tactics to be necessiated, somehow involving multiplication of microbes and explosions.

If these abilities had never existed, I believe the game would have been improved. Rather than eagerly awaiting tactics that never appeared or hoping for challenges that never arose, I would have at least enjoyed what was there.

By their mere existence, these 'unsupported' mechanics simply draw attention to what's not in the game.