I've discovered two glitches so far. Here's the first one:
Your maximum mana is only affected by your base Magic, right? It doesn't include bonuses from armor and staves. However, whenever you level up, if you put some points into magic, it will show your maximum mana as if your current mana-including the bonuses-is your base mana. For example, lets say my base mana is 37. With bonuses, it's 47. If I put three points into magic, my base mana would now be 160. With bonuses, it's 50. However, my mana bar shows it as 200- that's 50 times 4, whereas it should be 160; 40 times 4. Then, when you leave the room, your base mana returns to what it should be, but your current mana remains the same until used. For example, after I leveled up, I let my mana recharge to 180. Then I exit the room. It will show 180/160. I'm not sure if the same concept applies to health, for when you increase your defense, but it probably does.
Here's the second one:
I'm not actually sure if this one is a glitch, but it doesn't make sense to me if it isn't. When you are low on stamina, your character not only does less weapon damage, but he also does less MAGIC damage. Let's say my lightning strike ability does 500 per hit. I use my weapon to knock an enemy back, then use lightning bolt. It only does about 100 damage because I'm low on stamina. Magic is supposed to use the mind, however, so your stamina shouldn't affect it. And even if you do want it to be that way, Magic should have it's own, separate bar from melee, in my opinion-like, mind fatigue or something. Another result of this glitch is, even your magic POISON does less damage when you are fatigued, even if you already poisoned the person. Let's say my poison does 20 per hit. Then, however, I swing my weapon at an enemy. The next poison hit only does 3 damage because I'm fatigued. That doesn't make much sense to me.
Thank you for reading, I hope you resolve these issues! -Justin

Here's another photo.

You're absolutely correct with these glitches. Unfortunately, at the moment we are focused on Castaway Island TD, but will release an update to Castaway 2 when that project is complete.