Very nice implementaton of theme and cool way to allow player to engage with risk/reward mechanic. Aesthetics are pleasing.
My only suggestion is to improve feedback when enemies receive damage. Otherwise, really nice prototype to expand on!
Really cool vision of "Life in 2 dimensions" theme. Aesthetics and mechanics are easy and very appealing, yet game offers challenge.
I suggest that difficulty needs to spike faster (at about 300 points), so player can enter challenging part a lot faster. And oh, sounds were working only in my left earphone
Like aesthetics and controls of the game. Some niche problems tho:
1) Resource indicator for coins is not clear enough. I'm using coins to buy upgrades for my ghost and at the same time I use coins to traverse through dimensions.
2) Placement of both portals is a little weird, because sometimes I enter wrong village. I suggest placing them more separately
3) Ghost Energy regeneration in safe zone could be a lot faster.
Otherwise, I really dig your idea. Upgrades are cool.
Aesthetically and mechanically game looks good, but I have very big concern about difficulty curve. NPCs often leave you with little to no time to react. Some NPCs have placings where it's hard for player to approach safely and shoot them. In some tries I got to NPC and it immediately killed me after I crossed wall. As "hardcorish" as this game is, sometimes I feel like game is cheating on me. I would suggest implementing 3 HP system or lowering NPC's projectile speed, so player has more time to react.
Otherwise, I really like what you're trying to do there! Music and sounds helped me to feel immersed in the game.
Really cool prototype to expand on! Took some time to get good and understand how to fight against NPCs. Once I got it - flawless completion.
Aesthetics and music are really pleasing. They really help to feel the flow with the game. My only negatives are HP system (don't see a point with 3 Hearts if you die in 2 hits in most situations) and hit registration, which is extremely hard to polish in jam.
Oh, and one more positive thing. I absolutely love HP indicators above NPCs. So simple, yet so understandable and easy to read for players.