HTML5 tower defense
Home Page: https://oldj.net/static/html5-tower-defense/td.html
License: MIT License
I am a full-stack engineer and independent developer living in beautiful Hangzhou.
When you start a new game the previous quicksand count has been retained and it tells you that you can only have 3, when you don't have any.
有时候，拆除建筑后，虽然建筑已经不可见了，但貌似建筑原来占用的格子仍然不能通过，建造别的建筑时，在检查是否 block 时那个格子仍然会造成影响。
不是每次都会发生，较难重现。
怪物可以被围起来，围起来后，怪物会因为找不着路而呆掉，直到被打死或出现新的路。
两种可行的解决方案：
如题。
观察到好几次，暂时不清楚如何重现以及原因。
如题。
应该尝试将射程放到另一个更高的层里面绘制，以免被其它建筑遮挡。
枪口竖直时，有时会突然画出一条很长的竖线，但不是每次都发生。
比如每抗过一波，生命值 +5 ？
这样一来，高手就可以玩更长的时间了，甚至可以无限地玩下去。
春节无事，玩了半天这个小游戏，终于能在不作弊的情况下玩到了 50 波（打的认真点的话还能很多提升空间，但是打到后面实在打不动了，可能打了快一小时了，就有意无意放水了）。发个 issue 让作者知道一下 2024 了还有人在玩这游戏哈哈哈，也顺便贴一下我的思路讨论一下（主要作者博客评论区里貌似不能贴图片）。
思路其实就是把地图划分成两半，每一半都是一条通往终点的路（于是一共有两条路）。两半各自都尽量绕一点。然后每波在终点前堵上一条路，于是敌人只能走另一条路。当有敌人马上要从另一条路到达终点时，挖掉第一条路上的路障、并堵上第二条路，让所有敌人反向再走一圈。
应该还有不少地方可以探讨，比如
我目前是两半路线一样+斜着挖的，主要是起点终点在斜对角，斜着挖路线+轴对称比较满足强迫症。
作者考虑得还是相当完善的啊，路堵上敌人之后不会立即折返，而是有概率继续往前挪一段路，然后再折返。这样一方面是不是为了避免瞬时计算量太高；另一方面增加随机性，敌人有可能同时从两路走向终点，让游戏更难一点、对挖路障修路障的操作要求更高。
For example, if you add a line of text before <div id="wrapper">:
<body id="tower-defense">
a line of text
<div id="wrapper">
then within the canvas, mouse detection would be off by the height of text. I assume the same problem exists in x-direction too.
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