Item clips into ground, can't reach them, if on top at least u can drop to get them otherwise they're lost, mobs can respawn on you doing instant damages, played only 3 minutes found 2 obvious bugs, it's enough for me I guess
Sorry that your experience wasn't great. The items clipping into the ground only occur during the tutorial section of the game, once you get into the tower, they should be fine.
I will fix the enemy spawning, you actually do get a window where they won't damage you, it just won't be obvious until you're hit since they just pop without warning.
regardless, thanks for giving it a try and leaving feedback.