Running Mac 10.10.2 crashes every time I start it if I hit ignore, then relaunch it it seems to work. will gladly post the crash logs if you feel it can help.

I just had a good split screen run and then the came crashed without warning.
We had quite a lot of heroes spawned and I was spamming polymorph against the boss of one of the last levels (boss split into two, not the grub boss - on the zombies level)

Another thing that could be seen as a bug is how the game freezes briefly whenever something happens (blocks breaking? level up? enemy dying?), This makes it almost unplayable when there are many spawned heroes (especially the knight) in splitscreen.

___________________________________________
############################################################################################
FATAL ERROR in
action number 1
of Step Event0
for object obGameControl:

Push :: Execution Error - Variable Get 704145.x(0, -1)
at gml_Script_loop_char
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Script_loop_char (line 0)
gml_Object_obGameControl_Step_0

I just bought this game and It gets incrementally more laggy as I progress.
At the start of the first level everything is super smooth, no lag at all, even when there are many characters on screen and effects (explosions, knight on rampage etc.) going on. Then as I get closer to the bottom of the level the game gets more laggy. But just slightly, still playable.

At the start of level 2 the game is a little bit more laggy than at the end of the first level and at the end of lvl 2 the game is barely playable.

At the start of level 3 the game is completely unplayable. Heavy lag, even when nothing's happening other than me walking around.

I feel like it's getting more and more laggy with every character as well. So after maybe 10 more attempts lvl 1 will be unplayable at the end.

I've got nothing else running on the computer, it meets the minimum system requirements. I've tried restarting both the game and the computer. No luck. :(

Using MacBook Pro (15" 2008)
2,53 GHz Intel Core 2 Duo
4GB RAM
NVIDIA GeForce 9400M 256MB