Looks like a good start to a game but not much working that I could test at the moment so hard to judge. I played it on my youtube and left my feedback while playing to maybe give you some pointers. You can check it out here if you want.
GameDev.tv Game Jam 2024 - Free Course For All Submissions! » Entries » GDTV GameJam 2024 - Dungeon Defence
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The mouse issue is a recurring one for either itch or webgl, and its only a few people, unsure what triggers it, but i have had people report the same issue now for the 3rd year.
Other feedback is cool, some bits i kinda knew but had no time, couple things i didnt even think of, tho i swear i made the collisions on the wall work lol