Huzzahhh!! I think the term used was 'polishing', Some sprites have had a little update as they've been 'textured' now. Which makes it go from cool to cooler! Yano it does don't lie :P. 

So last night was a case on adding in a boss tank which i'll throw out every 10 waves... And I'm also thinking of doing 1 per every 10 so on wave 20 there will be 2 bosses... I've currently made them spawn 1 at a time though as well so not to ruin it too much... BUT I had an idea where whilst they are active, no enemies will take damage otherwise you're not really hitting the boss at all as you'd be hitting all the minions around it... But this proved to be broken immediately because the towers have a small range and simply having enemies immune whilst boss is present just allows all the enemies to get through... So i'm thinking of doing it where the when the bosses are 'inRange' I'll trigger a switch that will control enemies bullet collision stuff... when bosses are out of range, go back to the normal shooting enemies... or something like that... I don't really know, I'm actually thinking of consulting the game design and theories section to see about some ideas for bosses... I want to keep it simple but also make it a useful part of the game...

I'm just at that sort of stage now where thinks feel like they're done. There isn't anything 'new' to add unless I figure out the leaderboard stuff... I am thinking then i can do one more night of tinkering and then accept it as it is and as long as it works properly I can release the updated version on monday and try to get it tested and gather some more feedback.... And take it from there... 

Although whilst writing this I realize that I need to do the upgrade and sell button sprites still! Oops! I forgot something 

Not to mention the upgraded towers get a new look at Upgrade Level 5 too!! 

You currently don't get any money back from killing with walls... I'm not sure If I should give them money back or not.. Walls are currently a bit OP and need to be messed with a bit more... Like the initial idea was to have them block 10 enemies and then get destroyed but now they're blocking 10 enemies even if its the small, medium or large which seems to be a bit dodgy... So I want to have them do different amounts of damage to the walls and perhaps have the large ones destroy it immediately and still die, bosses could destroy immediately and think nothing of it, medium could half damage, and then small enemies could just dink off it the walls 10 times like planned....