The phrase "a collection of levels" is correct and usable in written English.
It can be used when referring to a group or assortment of different levels, such as in a game, a hierarchy, or a set of stages in a process.
Example: "The video game features a collection of levels that challenge players with increasing difficulty."
Alternatives: "a set of levels" or "a series of levels".
Intermediate band materials incorporate a collection of energy levels with special optoelectronic properties within the semiconductor bandgap.
It is characterized by a material hosting a collection of energy levels within its bandgap, allowing the cell to exploit photons with sub-bandgap energies in a two-step absorption process, thus improving the utilization of the solar spectrum.
The universe of Kingdom Hearts is a collection of various levels, referred to as "worlds", through which the player must progress.
The game's setting is a collection of various levels (referred to in-game as "worlds") that the player progresses through.
The data of Janes et al. [ 20] is a collection of protein levels or activity measurements of several molecules which are plotted versus time.
According to the control theory metaphor of software development, we map this problem onto a control architecture with one system-level controller and a collection of emitter-level controllers (one per emitter).
The town, a collection of single-level ranch houses and rough streets, is bordered by electric transmission wires and the California Aqueduct, which is sealed off from town residents by a barbed-wire, chain-link fence.
Considered by many around the world as a collection of B-level stars, they began to forge an identity as a hyperathletic and scrappy defensive team that could be considered the favorite heading into the world championships beginning Saturday in Turkey.
The ESWB are a collection of plant-level surveys meant to be representative of a country's non-agricultural private formal economy.
Executive control reflects a collection of separable meta-level abilities that regulate other (lower level) cognitive processes in the service of goal-directed behavior.
