usually i don't go rough in jam reviewing because i know its built in short time (10 days) which is a quite challenge on its own :3 so bugs is something can come around in most games :)
but since you asked (to work on it in the future), sure here is the full review :3
-in the Settings, pressing sound effects (ON/OFF) is not doing anything, so does the music
-Back button in settings and Credits scenes, animations not working, for example if you aim at the Start button it will get bigger smoothly and if you out touch it, it will go back to its size (first animation)
while the back buttons in Settings and Credits and achievements, works for the first time and then get stuck at the second animation (big animation without getting back to small size)
-in Achievements scene, move the grass from the latter K from "Kill 20 goblins!" for better vision
-in scene 3 where the first enemy attack the player, if i am on the right side and he touched me, he will push the player to right all the way to the first scene, and when that happened i couldn't come back to scene 2 even after killing the zombie
-in scene 3 as well the enemy pushed me far to right and got me in scene2 but the game got crazy and moved the camera away from the player and moved to scene 4 where the tornado passed by
-player health 0 nothing happened and the zombies still killing me and the camera is shaking
^at this point i had to refresh the page to restart the game because the game got completely bugged
-don't allow the player to move (WSDA) while watching the tutorial (right after going to start)
-pressing S+D in the same time will stop the player animation, it should use the same animation as Right, and Left for S+A
same thing goes to W+D and W+A
-in the first scene of the game (after the start, beginning of the story) the player walks very fast on grass or on dirt still super fast
but when i go left (in the next scene), everything works at normal speed
-when the zombie attack the player, player color turns red without going back to its normal color
-in boss level (big zombie) he pushed me all the way to left (out side the screen) and i cant bypass him, and the camera is still on the boss scene (not on the player)
maybe when the player is inside the boss level add blocks around the scene to not allow the player to get out of the scene even if the boss pushed him
-am sure the first time i played the game 3-4 enemies attacked me, i played again and only 1 enemy attacked me, other scenes are empty all the way to boss scene
-Q+1 do nothing (if you set it to quit the game, well in browser it don't do anything, i suggest making it go back to menu scene
-in the tutorial level, you can move on the house, make it NOT just like the in game houses (collision), so does the player (big one in the tutorial right above the house, give him a collision to not walk on him)
-sometimes am on the left side of the zombie but close to him, and still he push me right while he should push me to left (should be related to angle)
-in game, scene 1, the house is away from the dirt in 1 pixel, that looks not well, a lil push toward the dirt for line perfection :3
-when i hit the zombie (or the boss) with the hammer, if the player is on the right and the zombie or boss is on the left, the hammer still push them RIGHT, while it should push them against the player not always Right
-sometimes the game freezes right when i move to the next scene, (not sure if its my browser or the game, but worth checking)
-the tornado boss is really strong, his health is way too much, even using the sword i wont be able to kill him till few mins passes
maybe lower his health and give the boss an ability(from time to time) to spawn small tornadoes that follow the player around (just like the zombies but they are tornadoes)
Remember: this review is NOT for your submission on the game jam, its for the future updates for this awesome game :3,
for the jam: you already did an outstanding job making the game and submitting it <3