I've played your game in older DDs and I've always been a big fan, and especially with the new art it's pretty great. But I don't think I've ever given feedback except live during the streams, so I played it again and here's a nitpicky list of the things that I think could be improved.
- I don't like how the page turns fullscreen by itself Browser fullscreen is so janky, it makes the game flicker and readjust. Also, if I exit fullscreen and reenter it with f11, it goes into a "wrong" fullscreen mode with white bars around the game window. Both in this wrong fullscreen mode and when not using fullscreen at all, the game is not scaled correctly, which makes some of the text pretty hard to read.
Also, the browser caps the game at a low fps, I think, I'm pretty sure it would feel much better as a native game.
Because of all of this I think it would be a better impression overall if you treated the web version as just a demo, and had a big direct link to the native version of all times. It's just not worth it dealing with all of Chrome's crap in my opinion.
- I think the pixel rendering is off somehow, it feels that they jitter a bit too much when they move. Here's a video of me slowly scrolling past a sprite: https://files.catbox.moe/59r7fx.mp4
The full-resolution sprites like the trees don't have this, and if the pixel sprites were imported into the game already upscaled they should behave the same way as the trees.
- the ground tiles are nice for readability, but they are a bit bland, now that you have an artist maybe he could figure out some nicer backgrounds that are still readable.
- as a Notesman main, I wish that Mana Jam costed zero mana, so I don't get stuck at zero mana unable to use it to regenerate. I know this is a skill issue, but I want to play this game with my brain off.
- I think the item system could become more interesting with just a few changes. If I could drop items by dragging them on the ground, I could make more interesting choices about what I'm building rather than spamming E and hoping it's an upgrade compared to the one that gets switched at random. Also it could be fun if picking up an item that's identical to one you already have would merge them into a more powerful one.
Lootgoblining is the heart and soul of rotmg after all.
Overall it's a great game and I have great memories of playing it multiplayer in the old demoday streams. Hopefully we can get another match going soon.