I really like the music and sounds in this game. The idea is also quite interesting and I enjoyed the athmosphere. I can't confirm the performance issues, the game went fluent on my side. Only thing.. the part of when the second dog is coming.. it might sound dumb but I tried various times and it just felt impossible to pass it.  The dog anyway comes quite fast. Above that the path was very narrow and I didn't manage to escape. Now not sure if the dog events are fixed (always at the same spot?) or if dogs come by coincidence.. Anyway, finally I gave up at that part. If there's a trick behind, you maybe want to consider telling the player after he is caught (or after he was cought a certain amount of times. If not, then maybe reconsider the spot.

As for the grammar and spelling, Naomi is right. I'd just ask a native speaker to proofread it.

Like the music and sfxs.  Lots of grammar issues; the writing needs work.  After I saved, the text loaded very slowly for some reason, and wouldn't continue until I pressed spacebar multiple times.  Even after reloading this issue persisted.  I don't know why it's acting like this.

WAY too much text in this tutorial!  Teach me by doing, or at least with visuals.
"Please guide this boy safely.  Good luck."  I love that line.
Running and moving is also very slow; it's like the framerate has gone way down for some reason.  Because of that, I can't play the game properly; every time I go forward the framerate drops, the beast catches me, and I die.  I'm not sure why this issue is occuring, as it hasn't come up in any other RPG Maker MV games in the jam.  I'd like to play this game, but with this issue, I can't.  I'm sorry.

At first I thought it would be a boring "run-away-from-monster" kind of game but man, I'm glad I am wrong. This game have enough tension to make my heart beating a little faster (No, I am not scared...at all) but not too much that it create frustration. 

The mechanic and the gameplay is pretty good and I actually enjoyed that I need to be a little stealthy than just barraging through the enemies to get to the other side.

The only complaint I have is the riddle is kinda confusing although that is what it suppose to do.  Luckily, the game can still be finished even without me understanding some of the riddle.

P.S. The game stuck at the end although I'm pretty sure it's my computer's fault but still, I want to see the ending.