Ballast air consumption is not dependent on how quickly the ballast is being filled.

[ChrisMondok]

While adding ballast air, the submarine loses air at dt * 1000 * balllastAirUsageRate. This is independent on the amount of added air, which is multiplied by INPUT.up. As a result, more careful players are penalized.

ludum-dare-48/submarine.ts

Line 260 in ce3f7ce

this.air -= dt * 1000 * this.ballastAirUsageRate;