Games like Astronaut: The Moon Eclipse
Games like Astronaut: The Moon Eclipse include Timberman, Vampire Survivors, Skul: The Hero Slayer, One Finger Death Punch 2, and Broforce. We matched them by the tags players give Astronaut: The Moon Eclipse on Steam (Action, Casual, Indie, and 2D): closest matches first, and among equally close ones the better-known games.

Timberman
Shared: Casual · Indie · Action

Vampire Survivors
Shared: 2D · Indie · Casual

Skul: The Hero Slayer
Shared: Action · Indie · 2D

One Finger Death Punch 2
Shared: Action · Indie · Casual

Broforce
Shared: Action · 2D · Indie

ShellShock Live
Shared: Action · 2D · Casual

Pikuniku
Shared: Indie · Casual · Action

One Finger Death Punch
Shared: Action · Indie · 2D

Gensokyo Night Festival
Shared: Action · Indie · Casual

Cyberhunt
Shared: Action · Indie · Casual

Zup! S
Shared: Casual · Indie · 2D

Streets of Rage 4
Shared: Action · Indie · 2D

Minimalism
Shared: Casual · Action · Indie

UFO 50
Shared: Indie · Action · 2D

Move or Die
Shared: Action · 2D · Indie

Zup! 2
Shared: Casual · Indie · 2D

Super Fancy Pants Adventure
Shared: Action · Indie · Casual

Stick Fight: The Game
Shared: Action · 2D · Casual

Zup!
Shared: Casual · Indie · 2D

Bladed fury
Shared: Action · Indie · Casual

A Dance of Fire and Ice
Shared: Indie · 2D · Casual

BEEP
Shared: Indie · 2D · Action

Yokai's Secret
Shared: Indie · Casual · Action

Rock 'N' Roll Defense
Shared: Casual · Action · Indie