Really nice how the game is packaged into an extracting zip, saves some time when getting the game loading.
Gameplay itself is interesting at first, but the incentive to keep playing quickly runs out, since the objective is to destroy all of the mold then finish. The player will only be doing those things because they have to, not because they want to. If the game had a way of converting the money resource into something the player could have, the mold enemies in the level will have double purpose. Levels dont seem to be randomly generated. The game had no way to communicate to the player that the flashlight was on, as such, every time you picked up batteries, your flashlight instantly ran out unless you kept track of the state. A probable fix is to either change what the flashlight icon looks like if its off, or turn it off completely if it runs out. Flashlight also seems to serve 0 purpose, since you can already see without it.
The intro sequence is a really really nice touch, its nice that you explain the universe that this game takes place and it really helps. Feedback on pickups, shooting, and progression is also a really nice touch. Its important that the game communicates important events with the player, especially if theyre to do with progression. Overall, the game feels really cohesive and consise, its a simple idea that works really well if expanded upon in the future.