It was pretty cool.. but.. it just kind of stops at level 369.. Would have liked it to continue a bit further. Some suggestions though as you move forward:
1. The pointer upgrades are kinda weak when you consider the cost of units (paladin on up) and the goal amount of gold. Even using an auto-clicker it takes a long time to hit a billion and that is without having to spend gold on upgrades and expensive units. At 100k/click that is still 10k clicks, and it seems to have a cap on clicks per second, so even though I have my auto-clicker set to double click at 1ms intervals it still takes 7 seconds to get 10 million gold (roughly 14 clicks per second counted) so about 12 minutes of constant clicking to get to 1 billion. Without an auto-clicker that is not going to happen.
2. Although the units look cool in battle they don't seem to actually interact. I.e. they swat at the air and the opponent swats at the air without any actual interaction then one fades into the ground. This really impacts the feel of the game, I don't know how some of the units look in battle because I couldn't afford to buy them until after baddies stopped spawning.
3. The bar on the left with the units isn't large enough. Portions of the units are cut off. It should be tall and wide enough to show the full unit without cutting bits off. Is there anything after the angel? Price wise I should hope not, but you can't tell. I wasn't even expecting the angel because the wizard is literally already at the bottom.
4. Literally nothing happens when you get to the 'win' condition. At least it could say good job or something. However, given that nothing has happened for quite some time before you get there. I figure this is something that you would intend to flush out in your final release.
Overall though, as my score reflects it is a good start to a game. It definitely needs flushing out in some future version. For those reading this before they play it I would say that it really isn't worth continuing to play after the baddies stop coming. If you survive to that point, congrats you have won the game, just close it because the rest is pointless. Look forward to future updates, keep up the good work!