Cool! I like the idea of a reverse Peggle, definitely a lot of potential there in terms of game mechanics and level design. Reminds me of Peglin in that it's a more modern take on the genre.
Had fun playing the game, wish there were more levels. I like that it isn't just a game of "keep away", but there is also a more puzzle based aspect where the player has to figure out how to raise their income levels and keep the sword in the air for a certain amount of time to finish the level, as demonstrated in level 2.
Like others, I think the game would benefit from a little bit more tutorialization, but at the same time it's good to have the player experiment a bit. I believe that it isn't necessarily bad design to have the player fail a couple times.
Good stuff!