I like the idea, but it's easy to win. I built several blocks in front of the castle and all knights died, and the winning screen keeps flashing. I can see the potential of the idea, it just needs more polishing. 

i dont understand how to play the game

I didn't really understand how to play the game. There where some things (mine and fields) which couldn't be placed for some reason and so I ended up building alot of spikes only to get a game over screen after an enemy died from them in wave 2?

The music was really enjoyable - it reminded me of Age of Empires II.

Unfortunately I also had some kind of bug where I would click not where my cursor was, but somewhere up right from it. Maybe this is because I'm playing on a higher resolution than 1080p.

With a little tutorial or at least an explaining text on the project's page it could be very fun.

I feel like the idea itself had a lot of potential and could become quite an enjoyable experience.

However, I did not find the game UI very intuitive, and I spent most of the time figuring out what I am supposed to do. What would help a lot is adding some instructions or descriptions of some of the objects that can be placed into the grid.

It is very likely that you didn’t have enough time to add everything you wanted. For your upcoming projects, I would recommend first making a prototype that is fully working and perhaps making someone else play it so that they can give you some critique, which could help you improve your gameplay. Then and only then, start replacing placeholder objects with actual assets.

I am sorry if I was a little too harsh in this comment, I hope it will help at least a little bit. Anyway, good luck with any upcoming projects/gamejams.

I like the idea behind it and with some polish I can see myself sinking hours into this game

I've been spelling the words blok and lader wrong my whole life! thank you for teaching me this 10/10

Epilepsy warning when losing the game, the screen flashes extremely quickly

My mouse doesn't seem to align with the in-game placement of items, I'm playing on a 1440p screen.

Outside of this, I like the concept of a sidescroller tower defense!  Creating arduous paths with climbs and drops into spikes is pretty fun