The cartoony art style with fairly modern setting and front-view battle system reminds me of Earthbound. However, there are some design decisions that hold the game back from being successful in my opinion. For example, the first area is like an escape room: you have to solve a puzzle by collecting required items and placing them appropriately. My problem is that while it's possible to access all parts of the house right away, you can't collect certain items before you collect other items. The order is pretty arbitrary; I would rather have had the ability to collect each item in any order.
Similarly, the only way to collect all of the ice crystals in the "outside" part of the game is to collect all of the crystals in the pond area, then exit the area and reenter to grab an additional respawned crystal. Why not just have all of the necessary crystals available from the start? There are plenty of stalagmites to hold all of the required crystals, so the decision to withhold one is just baffling.
I suspect English is not your first language, but there are several spelling errors and some odd text choices that keep the story from having the impact you were going for.
I found the battles needlessly difficult and boring. The skill choices are effectively attack, guard, and slightly stronger attack, and even when using all of these choices as efficiently as possible the battles still took what seemed like too many turns and I ended up close to dead by the end of each battle.
I know that the long walk near the end of the game was supposed to drive home the idea that the player was walking for a long time, but the scenery was boring and pretty meaningless; it was needlessly long and just pads out the play time. I think going from the transition point on the previous map and cutting to the end cutscene would have been better without losing any impact.
In summary, the game looks good, but I think there are some structural issues that should be addressed before proceeding with development. I hope these criticisms are helpful for the game's future progress.