Nice work!
This reminds me of the "Advance Wars" game series on GBA.
You can play on any device at any time, in sync or async games and interact with other players.
It comes with the exact same map and campaign editors we are using to build the game. You can collaborate with friends on a campaign and share them with anyone.
It has no load times.
Wargroove (advanced wars)
Stardew Valley (harvest moon)
Etc. Wargroove isn’t really even “indie” as Chucklefish is a very established studio.
So, yeah… this is normal and not worthy of criticism.
"Plagiarism" does not mean what you think it means.