  The CoMET R&D project focuses on the development of a new technique for the
observation of very high-energy (VHE) $\gamma$-rays from the ground at energies
above ~200 GeV, thus covering emission from soft-spectrum sources. The CoMET
array under study combines 1242 particle detector units, distributed over a
circular area of ~160 m in diameter and placed at a very high altitude (5.1
km), with atmospheric Cherenkov light detectors.
  The atmospheric Cherenkov light detectors, inspired by the "HiSCORE" design
and improved for the energy range of interest, can be operated together with
the particle detectors during clear nights. As such, the instrument becomes a
Cosmic Multiperspective Event Tracker (CoMET). CoMET is expected to improve the
reconstruction of arrival direction, energy and shower maximum determination
for $\gamma$-ray-induced showers during darkness, which is crucial for the
reduction of background contamination from cosmic rays. Prototypes of both
particle and atmospheric Cherenkov light detectors are already installed at
Linnaeus University in Sweden, while in parallel we simulate the full detector
response and estimate the reconstruction improvement for $\gamma$-ray events.
  In this contribution, we present Monte-Carlo simulations of the detector
array, consisting of CORSIKA shower simulations and custom detector response
simulations, together with the coupling of particle and atmospheric Cherenkov
light information, the reconstruction strategy of the complete array and the
detection performance on point-like VHE $\gamma$-ray sources.
